AP Exhaust 700488 Exhaust Muffler

AP Exhaust 700488 Muffler Overview

AP Exhaust 700488 is a direct-fit exhaust muffler for select Chevrolet Silverado and GMC Sierra applications. It uses an oval, baffled design with aluminized steel construction and OE-comparable sound output for a factory-style exhaust tone.

Key Features

• Part number: 700488
• MSL series muffler with baffled internal configuration
• Oval body measuring 24 in. long, 11.5 in. wide, and 8.5 in. high
• Aluminized steel body material for everyday exhaust service
• 3 in. inlet inside diameter with left upper inlet location
• 3.5 in. outlet inside diameter with left lower / right lower outlet location
• OE comparable sound level for a factory-style exhaust note
• Direct-fit replacement for welded OE exhaust assemblies in listed applications

Detailed Description

AP Exhaust 700488 is built for drivers replacing a worn or damaged factory muffler on select Chevrolet Silverado 2500, Silverado 2500 HD, Silverado 3500, Silverado 3500 Classic, GMC Sierra 2500, Sierra 2500 HD, Sierra 3500, and Sierra 3500 Classic models. The baffled MSL design supports controlled exhaust flow and a sound level that stays close to OE output, while the aluminized steel body adds corrosion resistance for standard-duty use. This muffler measures 28.25 inches overall and uses a pipe-style outlet with dual pipe inlets, making it a practical OE-style replacement for trucks originally equipped with welded exhaust sections. AP Exhaust 700488 is a direct-fit solution for restoring exhaust function and maintaining the original tone on the listed Silverado and Sierra applications.

Vehicle Fitment

• Fits 2007 Chevrolet Silverado 3500 Classic, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
• Fits 2007 Chevrolet Silverado 3500 Classic, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 4WD; Cab-Chassis; 133", 157.5" & 167" W.B.; CLASSIC
• Fits 2007 GMC Sierra 3500 Classic, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
• Fits 2007 GMC Sierra 3500 Classic, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 4WD; Cab-Chassis; 133", 157.5" & 167" W.B.; CLASSIC
• Fits 2001-2006 Chevrolet Silverado 2500 HD, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
• Fits 2004-2006 Chevrolet Silverado 3500, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
• Fits 2001-2006 GMC Sierra 2500 HD, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
• Fits 2004-2006 GMC Sierra 3500, N/A — DIRECT FIT MSL/MAXIMUM Muffler; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.
• Fits 1999-2001 Chevrolet Silverado 2500, N/A — DIRECT FIT MSL/MAXIMUM Muffler; (Exc. HD Models); (2001 Federal Emissions)
• Fits 1999-2001 GMC Sierra 2500, N/A — DIRECT FIT MSL/MAXIMUM Muffler; (Exc. HD Models); (2001 Federal Emissions)

Common Replacement Reasons

• Restoring a damaged or rusted factory muffler
• Replacing a welded OE exhaust assembly on listed trucks
• Correcting exhaust noise that has become louder than factory levels
• Addressing exhaust flow restriction from a failing muffler
• Returning a Silverado or Sierra exhaust system to OE-style operation

Installation Notes

Verify the inlet and outlet locations, body dimensions, and vehicle notes before installation. This application includes direct-fit coverage for welded OE systems, so related exhaust parts noted in the fitment comments should be inspected and replaced as needed. For 2007 Silverado 3500 Classic and Sierra 3500 Classic cab-chassis models, confirm wheelbase and 4WD notes before ordering. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Quality Assurance

AP Exhaust manufactures replacement exhaust components for OE-style service applications. Part number 700488 uses aluminized steel construction and a baffled muffler design to support consistent fitment and factory-like sound characteristics in the listed Chevrolet and GMC truck applications.