HomeExhaust > MufflersWalker 21686 Exhaust Muffler
Part #: 21686

Walker 21686 Exhaust Muffler

Quiet-Flow SS
6 vehicles fit this part
Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
Quiet-Flow SS
Fitment: Chevrolet, HHR
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Walker Quiet-Flow SS Exhaust Muffler 21686

The Walker Quiet-Flow SS Exhaust Muffler 21686 is designed specifically for Chevrolet HHR models, providing a precise fit and reliable performance. This oval-shaped reflection muffler features a durable aluminized stainless steel body, engineered to meet the demands of your vehicle's exhaust system.

  • Specific fit for Chevrolet HHR
  • Oval reflection muffler design
  • Durable aluminized stainless steel construction
  • 2.25-inch inlet inside diameter with offset pipe connection
  • Single inlet and outlet with 2-inch outlet tip diameter
  • Overall length of 27.75 inches and body length of 17 inches
  • Non-reversible and non-tunable design

Detailed Product Features and Specifications

The Walker Quiet-Flow SS 21686 muffler is built with a reflection muffler type that helps reduce exhaust noise effectively while maintaining optimal exhaust flow. Its oval shape and regular grade type provide a balance between performance and durability. The muffler body measures 9.5 inches in width, 7.5 inches in height, and 17 inches in length, with an overall length of 27.75 inches, making it a precise match for the Chevrolet HHR exhaust system.

Constructed from aluminized stainless steel, this muffler offers corrosion resistance and longevity. The inlet features a 2.25-inch inside diameter with an offset pipe connection, offset by 2 inches, ensuring proper alignment with the vehicle’s exhaust piping. The outlet tip has a 2-inch outside diameter, designed for a clean exhaust exit. This muffler includes one inlet and one outlet, both configured with offset pipe connections, and is neither reversible nor tunable.

Walker Quiet-Flow SS Product Line

The Quiet-Flow SS line by Walker focuses on providing specific-fit exhaust components that combine stainless steel durability with noise reduction technology. This product line is engineered to meet OE specifications, offering a balance of sound control and exhaust flow efficiency. The 21686 muffler is part of this line, designed to deliver consistent performance and fitment for Chevrolet HHR vehicles.

Applications and Problem Solving

  • Replacement for worn or damaged mufflers on Chevrolet HHR
  • Reduces excessive exhaust noise caused by muffler failure
  • Prevents exhaust leaks due to corrosion or physical damage
  • Restores proper exhaust flow and backpressure for engine efficiency
  • Maintains vehicle emissions compliance by ensuring exhaust integrity

Installation Notes and Tips

This muffler is designed for specific fitment on Chevrolet HHR models and requires proper alignment of the offset inlet and outlet connections. Ensure the 2.25-inch inlet pipe connection matches the vehicle’s exhaust pipe diameter. Due to its non-reversible and non-tunable design, verify orientation before installation. Professional installation is recommended to maintain exhaust system integrity and performance.

Quality Assurance and Warranty

Walker manufactures the Quiet-Flow SS 21686 muffler with aluminized stainless steel for enhanced corrosion resistance and durability. While specific warranty details are not provided here, Walker products typically meet or exceed OEM standards for quality and reliability. For warranty information, refer to Walker’s official documentation or contact the manufacturer directly.

BrandWalker
Part Number21686
PositionQuiet-Flow SS
Muffler TypeReflection
Universal Or Specific FitSpecific
ShapeOval
Grade TypeRegular
Inlet Inside Diameter2.25
Body Width9.5
Inlet Quantity1
Outlet Quantity1
ReversibleNo
TunableNo
Overall Length27.75
Body Height7.5
Body Length17
Body MaterialStainless steel
FinishAluminized
Inlet 1 Inside Diameter2.25
Inlet 1 TypePipe connection
Inlet ConfigurationOffset
Inlet Offset2
Inlet TypePipe connection
Outlet 1 Outside Diameter2
Outlet 1 TypeTip
Outlet ConfigurationOffset
Outlet Outside Diameter2
Outlet TypeTip

This part fits 6 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011ChevroletHHR2.4LL4N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2010ChevroletHHR2.4LL4N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2009ChevroletHHR2.4LL4N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2008ChevroletHHR2.4LL4N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007ChevroletHHR2.4LL4N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006ChevroletHHR2.4LL4N/APremium; 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:

2508

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.