Walker 21502 Exhaust Muffler - Right
OE Quality 60-Day Returns
Walker
 Quiet-Flow SS

Walker 21502 Exhaust Muffler - Right

Brand Walker 21502
Position Right
Inlet Outside Diameter 2
Universal Or Specific Fit Specific
Shape Oval
Grade Type Regular
Body Width 9
Inlet Quantity 1
Reversible No
Tunable No
Overall Length 28.75
Body Height 7
Body Length 14
Body Material Stainless steel
Finish Aluminized
Inlet 1 Outside Diameter 2
Inlet 1 Type Pipe connection
Inlet Configuration Offset
Inlet Offset 2.625
Inlet Type Pipe connection
Muffler Type Combination
Outlet 1 Outside Diameter 2.25
Outlet 1 Type Tip
Outlet 2 Outside Diameter 2.25
Outlet Configuration Offset
Outlet Outside Diameter 2.25
Outlet Quantity 2
Outlet Type Tip
Product line Quiet-Flow SS
Fits Pontiac · 6 vehicles

100% stainless-steel construction. Resists corrosion for long-lasting exhaust performance.

Precision fit. Specific-fit design helps installation go smoothly.

OE-style sound. Delivers a factory-like exhaust note.

Cross-references AP Exhaust 24006 and 2243 for the same application. See all 2.

$131.03Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
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Select your vehicle to confirm fitment
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Step 2 — Quantity
Order total $131.03
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Walker Quiet-Flow SS Muffler for Pontiac Grand Prix

Walker Quiet-Flow SS muffler Part Number 21502 is a specific-fit exhaust muffler built for select Pontiac Grand Prix applications. It uses 100% stainless-steel construction with an OE-style sound profile, precision fit, and improved exhaust flow for a direct replacement on the right side.

Key Features

  • Specific-fit exhaust muffler for select Pontiac Grand Prix models
  • 100% stainless-steel body construction
  • Oval muffler body with a combination muffler design
  • Offset inlet and dual offset outlets for the listed application
  • 2-inch inlet outside diameter and 2.25-inch outlet outside diameter
  • Walker Quiet-Flow SS product line for OE-style sound and fit
  • Part Number 21502

Product Details

This Walker Quiet-Flow SS muffler is engineered for 2003-2008 Pontiac Grand Prix, right side, premium models with dual exhaust. The oval stainless-steel body measures 28.75 inches overall, with a 14-inch body length, 9-inch body width, and 7-inch body height. The inlet uses a 2-inch pipe connection with an offset configuration, while the dual 2.25-inch outlets use tip-style connections and an offset outlet layout. Part Number 21502 is a direct-fit exhaust muffler for drivers replacing a worn or noisy rear muffler on the Pontiac Grand Prix.

The Quiet-Flow SS line is Walker’s stainless-steel muffler family for broad domestic and import coverage. It focuses on fit accuracy, steady exhaust flow, and a sound level that stays close to OE expectations rather than adding excessive noise. This part cross-references AP Exhaust 24006 and 2243 for the same application.

What It Helps Address

  • Exhaust noise from a damaged or rusted rear muffler
  • Restricted exhaust flow caused by internal muffler deterioration
  • Fitment issues when replacing the right-side muffler on a dual-exhaust Pontiac Grand Prix
  • Corrosion concerns in a stainless-steel replacement design
  • Restoring OE-style exhaust tone after muffler failure

Installation Notes

Compatible With 2003-2008 Pontiac Grand Prix, right side, premium models with dual exhaust. Verify inlet and outlet orientation, offset dimensions, and pipe diameter before installation. If the original assembly was welded, replace all required related exhaust components to ensure proper alignment and sealing. Professional exhaust installation is recommended for best fit and finish.

Quality Assurance

Walker Quiet-Flow SS mufflers are built with 100% stainless-steel construction and are positioned as precision-fit replacement mufflers with OE-style sound characteristics. Part Number 21502 is intended for the listed Pontiac Grand Prix applications and follows Walker’s Quiet-Flow SS design standards for fit and exhaust performance.

Related reading

This part fits 6 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2008PontiacGrand Prix3.8LV6RightPremium; with Dual Exhaust; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2007PontiacGrand Prix3.8LV6RightPremium; with Dual Exhaust; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2006PontiacGrand Prix3.8LV6RightPremium; with Dual Exhaust; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2005PontiacGrand Prix3.8LV6RightPremium; with Dual Exhaust; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004PontiacGrand Prix3.8LV6RightPremium; with Dual Exhaust; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003PontiacGrand Prix3.8LV6RightPremium; with Dual Exhaust; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
Directly replaces or cross-references 2 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
AP Exhaust — 240062243