OE Quality
60-Day Returns

Walker 21690 Exhaust Muffler - Front
Overview of Walker Quiet-Flow SS Exhaust Muffler 21690
The Walker Quiet-Flow SS Exhaust Muffler 21690 is designed specifically for Chevrolet Equinox and GMC Terrain models. This oval-shaped muffler features a reflection muffler type and is constructed from aluminized stainless steel for durability and corrosion resistance.
- Specific fit for Chevrolet Equinox and GMC Terrain
- Oval body shape with 8.81 inches width and 4.25 inches height
- Reflection muffler type for effective sound reduction
- Stainless steel body with aluminized finish for corrosion resistance
- Inlet and outlet pipe connections with 2.25 inch diameter
- Reversible design for flexible installation
- Overall length of 19 inches with offset inlet and outlet configurations
Detailed Product Description
The Walker Quiet-Flow SS 21690 exhaust muffler is engineered to meet the specific exhaust requirements of Chevrolet Equinox and GMC Terrain vehicles. Its reflection muffler design helps reduce exhaust noise by reflecting sound waves within the muffler chamber. The oval-shaped body measures 8.81 inches in width, 4.25 inches in height, and 15 inches in body length, providing a compact yet efficient design. Constructed from aluminized stainless steel, this muffler offers enhanced resistance to rust and corrosion, extending the service life under various driving conditions.
The muffler features a single inlet and outlet, both with a 2.25 inch diameter pipe connection, and an offset configuration with a 2.625 inch inlet offset. Its reversible design allows for flexible installation depending on the exhaust system layout. The overall length of 19 inches ensures compatibility with the exhaust routing of the specified vehicle models.
About the Quiet-Flow SS Product Line
The Quiet-Flow SS line by Walker focuses on providing durable, corrosion-resistant mufflers with sound-reducing reflection technology. This product line is designed to deliver reliable exhaust performance while minimizing noise, making it suitable for specific vehicle applications such as the Chevrolet Equinox and GMC Terrain. The aluminized stainless steel construction is a hallmark of the Quiet-Flow SS series, offering a balance of longevity and sound control.
Common Applications and Problem Solving
- Replacement for worn or damaged mufflers on Chevrolet Equinox and GMC Terrain
- Reduction of excessive exhaust noise caused by muffler failure
- Prevention of exhaust leaks due to rust or corrosion
- Restoration of proper exhaust flow and backpressure
- Improvement of vehicle emissions control by maintaining exhaust integrity
Installation Notes and Tips
This muffler is designed for specific fitment on Chevrolet Equinox and GMC Terrain models, ensuring proper alignment with existing exhaust components. The reversible design allows installers to orient the muffler for optimal fit. Both inlet and outlet connections use 2.25 inch pipe connections with offset configurations, so verify compatibility with your vehicle’s exhaust piping before installation. Professional installation is recommended to ensure secure mounting and proper exhaust sealing.
Quality Assurance and Warranty
Walker manufactures the Quiet-Flow SS 21690 muffler with aluminized stainless steel to resist corrosion and extend product life. While specific warranty details are not provided here, Walker products typically come with a limited warranty against defects in materials and workmanship. For exact warranty terms, consult the product documentation or manufacturer.
| Brand | Walker |
|---|---|
| Part Number | 21690 |
| Position | Quiet-Flow SS, Front |
| Inlet Outside Diameter | 2.25 |
| Muffler Type | Reflection |
| Universal Or Specific Fit | Specific |
| Shape | Oval |
| Grade Type | Regular |
| Body Width | 8.81 |
| Inlet Quantity | 1 |
| Outlet Inside Diameter | 2.25 |
| Outlet Quantity | 1 |
| Reversible | Yes |
| Tunable | No |
| Overall Length | 19 |
| Body Height | 4.25 |
| Body Length | 15 |
| Body Material | Stainless steel |
| Finish | Aluminized |
| Inlet 1 Outside Diameter | 2.25 |
| Inlet 1 Type | Pipe connection |
| Inlet Configuration | Offset |
| Inlet Offset | 2.625 |
| Inlet Type | Pipe connection |
| Outlet 1 Inside Diameter | 2.25 |
| Outlet 1 Type | Pipe connection |
| Outlet Configuration | Offset |
| Outlet Type | Pipe connection |
This part fits 38 vehicles. Search below:
| Year | Make | Model | Submodel | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|---|
| 2024 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2024 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2023 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2023 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2022 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2022 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2021 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2021 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2020 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2020 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2019 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2019 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2018 | Chevrolet | Equinox | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2018 | GMC | Terrain | 1.5L | L4 | Front | Quiet-Flow SS | |
| 2017 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2017 | GMC | Terrain | SL | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2017 | GMC | Terrain | SLT | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2017 | GMC | Terrain | SLE | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2016 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2016 | GMC | Terrain | SL | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2016 | GMC | Terrain | SLT | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2016 | GMC | Terrain | SLE | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2015 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2015 | GMC | Terrain | SL | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2015 | GMC | Terrain | SLT | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2015 | GMC | Terrain | SLE | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2014 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2014 | GMC | Terrain | SLT | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2014 | GMC | Terrain | SLE | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2013 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2013 | GMC | Terrain | SLT | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2013 | GMC | Terrain | SLE | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
| 2012 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2012 | GMC | Terrain | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2011 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2011 | GMC | Terrain | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2010 | Chevrolet | Equinox | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS | |
| 2010 | GMC | Terrain | 2.4L | L4 | N/A | Premium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.