HomeExhaust > MufflersWalker 21354 Exhaust Muffler
Part #: 21354

Walker 21354 Exhaust Muffler

Quiet-Flow SS
8 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$119.61Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Quiet-Flow SS
Fitment: Ford, Mustang
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 21354

The Walker Quiet-Flow SS Exhaust Muffler 21354 is designed specifically for Ford Mustang models, providing a precise fit and reliable performance. Crafted from aluminized stainless steel, this muffler offers durability and corrosion resistance for extended service life.

  • Specific fit for Ford Mustang exhaust systems
  • Oval-shaped muffler body measuring 8.813 inches wide and 4.25 inches high
  • Constructed from aluminized stainless steel for enhanced durability
  • 2-inch inlet and outlet pipe connections with offset configuration
  • Combination muffler type with a 19-inch overall length

Detailed Product Features and Specifications

This Walker Quiet-Flow SS muffler features a 2-inch inside diameter for both inlet and outlet pipes, designed with offset pipe connections to match the Ford Mustang's exhaust layout. The muffler body is oval-shaped, measuring 8.813 inches in width, 4.25 inches in height, and 16 inches in length, with an overall length of 19 inches. The body is made from aluminized stainless steel, providing resistance to rust and corrosion under typical driving conditions. This specific fit muffler is not reversible or tunable, ensuring a straightforward replacement part that aligns with factory specifications.

About the Quiet-Flow SS Product Line

The Quiet-Flow SS line by Walker focuses on delivering exhaust mufflers that balance sound reduction with durability. Utilizing stainless steel construction and aluminized finishes, the Quiet-Flow SS series is engineered to provide consistent performance and longevity. The 21354 muffler is part of this line, offering a combination muffler design tailored for specific vehicle applications like the Ford Mustang.

Common Applications and Problem Solving

  • Replacement for worn or damaged mufflers on Ford Mustang exhaust systems
  • Reduction of exhaust noise while maintaining proper exhaust flow
  • Prevention of exhaust leaks due to corrosion or physical damage
  • Restoration of factory exhaust sound and performance characteristics
  • Ensuring compliance with vehicle-specific exhaust fitment requirements

Installation Notes and Tips

Installation of the Walker Quiet-Flow SS 21354 muffler requires matching the 2-inch inlet and outlet pipe connections with the existing exhaust system. The offset inlet and outlet configuration should be aligned carefully to ensure proper fitment. This muffler is designed for a specific fit on Ford Mustang models, so verify compatibility before installation. Professional installation is recommended to ensure secure mounting and optimal exhaust performance.

Quality Assurance and Warranty

Walker manufactures the Quiet-Flow SS 21354 muffler with high-quality aluminized stainless steel materials to resist corrosion and wear. While specific warranty details are not provided, Walker products typically meet industry standards for durability and performance. Using a part number 21354 ensures you receive a component engineered for the Ford Mustang's exhaust system requirements.

BrandWalker
Part Number21354
PositionQuiet-Flow SS
Universal Or Specific FitSpecific
ShapeOval
Grade TypeRegular
Inlet Inside Diameter2
Body Width8.813
Inlet Quantity1
Outlet Inside Diameter2
Outlet Quantity1
ReversibleNo
TunableNo
Overall Length19
Body Height4.25
Body Length16
Body MaterialStainless steel
FinishAluminized
Inlet 1 Inside Diameter2
Inlet 1 TypePipe connection
Inlet ConfigurationOffset
Inlet Offset2.625
Inlet TypePipe connection
Muffler TypeCombination
Outlet 1 Inside Diameter2
Outlet 1 TypePipe connection
Outlet ConfigurationOffset
Outlet TypePipe connection

This part fits 8 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2004FordMustang3.8LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2004FordMustang3.9LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2003FordMustang3.8LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2002FordMustang3.8LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2001FordMustang3.8LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
2000FordMustang3.8LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
1999FordMustang3.8LV6N/APremium; Limited Lifetime Warranty; If welded assembly, replace all required parts; Quiet-Flow SS
1998FordMustang3.8LV6N/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:

2065

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