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Walker
Quiet-Flow SSWalker 21533 Exhaust Muffler
| Brand | Walker 21533 |
|---|---|
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Inlet Inside Diameter | 2.5 |
| Body Width | 9 |
| Outlet Inside Diameter | 3 |
| Outlet Quantity | 1 |
| Reversible | No |
| Tunable | No |
| Overall Length | 28 |
| Body Height | 7 |
| Body Length | 24 |
| Body Material | Stainless steel |
| Finish | Aluminized |
| Inlet 1 Inside Diameter | 2.5 |
| Inlet 1 Type | Pipe connection |
| Inlet 2 Inside Diameter | 2.5 |
| Inlet 2 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 1.625 |
| Inlet Quantity | 2 |
| Inlet Type | Pipe connection |
| Muffler Type | Combination |
| Outlet 1 Inside Diameter | 3 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Offset |
| Outlet Type | Pipe connection |
| Product line | Quiet-Flow SS |
| Fits | Chevrolet and GMC · 90 vehicles |
100% stainless steel. Resists corrosion for long-lasting exhaust performance.
Precision fit. OE-style replacement with superior flow and sound.
Oval combination design. Delivers a balanced muffler layout for exhaust systems.
Cross-references 15798954 for the same application. See all 1.
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Walker Quiet-Flow SS Muffler for Heavy-Duty GM Trucks
Walker Quiet-Flow SS Muffler Part Number 21533 is a specific-fit exhaust muffler built for select Chevrolet Silverado and GMC Sierra applications. It combines stainless-steel construction with an OE-style sound profile and a precision fit for direct replacement use on compatible trucks.
Key Features
- Walker Quiet-Flow SS line for OE-style exhaust sound and controlled flow
- 100% stainless-steel body construction for corrosion resistance
- Oval muffler design with a 24-inch body length and 28-inch overall length
- Specific fit for select Chevrolet Silverado 2500 HD, Silverado 2500, Silverado 3500, Silverado 3500 Classic, GMC Sierra 2500 HD, Sierra 2500, Sierra 3500, and Sierra 3500 Classic applications
- 2.5-inch dual inlet pipe connections with 3-inch single outlet pipe connection
- Offset inlet and offset outlet configuration for listed vehicle applications
- Walker Part Number 21533 for catalog and fitment lookup
Product Details
Walker Quiet-Flow SS is the brandβs stainless-steel muffler line focused on direct-fit replacement for domestic and import vehicles. This muffler uses an oval combination design with a stainless-steel body and aluminized finish, delivering a factory-style sound character while maintaining efficient exhaust flow. Part Number 21533 is listed for select 2001-2007 Chevrolet Silverado and GMC Sierra trucks, including 2001-2006 Silverado 2500 HD and Sierra 2500 HD, 2004 Silverado 2500 and Sierra 2500, 2006 Silverado 3500 and Sierra 3500, and 2007 Silverado 3500 Classic and Sierra 3500 Classic. This part cross-references 15798954 for the same application.
What This Muffler Helps Address
- Rust or corrosion in the original muffler body
- Exhaust noise that has become louder than OE levels
- Restricted exhaust flow from a worn internal muffler
- Fitment issues on trucks requiring a 2.5-inch inlet and 3-inch outlet configuration
- Replacement needs on Silverado and Sierra trucks with federal emission system applications
Installation Notes and Tips
Compatible With 2001-2006 Chevrolet Silverado 2500 HD, N/A; 2001-2006 GMC Sierra 2500 HD, N/A; 2004 Chevrolet Silverado 2500, N/A; 2004 GMC Sierra 2500, N/A; 2006 Chevrolet Silverado 3500, N/A; 2006 GMC Sierra 3500, N/A; 2007 Chevrolet Silverado 3500 Classic, N/A; and 2007 GMC Sierra 3500 Classic, N/A, with the listed engine and exhaust configuration notes. Review the vehicle notes carefully before ordering, especially the 2.5-inch muffler inlet requirement and the instruction to use reducer bushing 41974 to connect with the OE converter pipe where specified. If the original system is welded, replace all required parts during service to maintain proper alignment and sealing.
Quality Assurance
Walker Quiet-Flow SS mufflers are built with 100% stainless-steel construction and are positioned as precision-fit replacement parts with OE-style sound characteristics. The manufacturer notes limited lifetime warranty coverage on the listed fitment applications.
This part fits 90 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
| Year | Make | Model | Body Type | Liters | Cylinders | Wheel Base | Position | Notes |
|---|---|---|---|---|---|---|---|---|
| 2007 | Chevrolet | Silverado 3500 Classic | Cab & Chassis | 8.1L | V8 | 133.0" | N/A | Except Heavy Duty; Premium; with 2.5 (in) Muffler Inlet; Limited Lifetime Warranty; with Single Rear Wheels (SRW); If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2007 | Chevrolet | Silverado 3500 Classic | Cab & Chassis | 6.0L | V8 | 133.0" | N/A | Except Heavy Duty; Premium; with 2.5 (in) Muffler Inlet; Limited Lifetime Warranty; with Single Rear Wheels (SRW); If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2007 | GMC | Sierra 3500 Classic | Cab & Chassis | 8.1L | V8 | 133.0" | N/A | Except Heavy Duty; Premium; with 2.5 (in) Muffler Inlet; Limited Lifetime Warranty; with Single Rear Wheels (SRW); If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2007 | GMC | Sierra 3500 Classic | Cab & Chassis | 6.0L | V8 | 133.0" | N/A | Except Heavy Duty; Premium; with 2.5 (in) Muffler Inlet; Limited Lifetime Warranty; with Single Rear Wheels (SRW); If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 3500 | Crew Cab Pickup | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 3500 | Extended Cab Pickup | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 3500 | Standard Cab Pickup | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 3500 | Standard Cab Pickup | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 3500 | Crew Cab Pickup | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | Chevrolet | Silverado 3500 | Extended Cab Pickup | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 3500 | Standard Cab Pickup | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 3500 | Extended Cab Pickup | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 3500 | Crew Cab Pickup | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 3500 | Crew Cab Pickup | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 3500 | Standard Cab Pickup | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2006 | GMC | Sierra 3500 | Extended Cab Pickup | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with 9900 (lb) Gross Vehicle Weight (GVW); with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2005 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2004 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2003 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2002 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | Chevrolet | Silverado 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | Chevrolet | Silverado 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | GMC | Sierra 2500 HD | — | 6.0L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 133.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 143.5" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
| 2001 | GMC | Sierra 2500 HD | — | 8.1L | V8 | 153.0" | N/A | Premium; with 2.5 (in) Muffler Inlet; with Federal Emission System; except Low Emission Vehicle (LEV); Limited Lifetime Warranty; If welded assembly, replace all required parts; with Small Diameter Muffler; Use Reducer Bushing 41974 to connect with OE Converter Pipe; Quiet-Flow SS |
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Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
15798954