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2005-2010 Roush Mustang GT/GT500 Exhaust Kit — image 1

Exhaust

2005-2010 Roush Mustang GT/GT500 Exhaust Kit

Roush part # 421915

$799.99

Roush retail price · part only

Installed at our shop

est. $1,099.99

Part $799.99 + about 2 hrs labor at $150/hr ($300.00).

Estimate only — shop supplies and sales tax not included. We confirm the final installed price for your exact vehicle before any work.

Fits: 2005–2010 Mustang

Installed at our East Bridgewater shop, or shipped anywhere in the US. Prefer to talk? 508-715-3554

  • Genuine ROUSH Performance part, from an authorized Gold Dealer
  • Installed by Ford specialists at our East Bridgewater shop
  • Roush retail price. Installed price estimated up front, confirmed before work

Prices and availability subject to change. Prices updated October 2, 2026.

Details & specs

The Roush Performance Axle-Back Exhaust Kit is expertly engineered to provide optimal performance and enhance the growl of your 2005-2010 Mustang GT (4.6L V8) and 2007-2010 GT500 (5.4L V8) with a more aggressive tone. Constructed with 409 aluminized stainless steel piping and featuring a mandrel-bent design, this exhaust offers durability and consistent flow. The system is completed with 2 4" 304 stainless steel chrome-flashed tips, marked with the Roush logo, for a polished look and maximum resistance to rust. Its nonrestrictive straight-through design produces a deep, powerful sound unique to Roush. Moreover, it is engineered according to the original manufacturer's CAD data for a seamless fit and easy installation. All necessary hardware and instructions are included.

Product highlights for the 2005-2010 Mustang GT/GT500 ROUSH Extreme Exhaust:

  • Fits 2005-2010 Mustang GT (4.6L V8) & 2007-2010 Mustang GT500 (5.4L V8)
  • Roush Extreme Axle-Back Exhaust System
  • Designed for improved performance
  • Straight-through resonator design provides very aggressive tone
  • Piping is 2.5” in size and is made from mandrel-bent 409 aluminized stainless steel for consistent flow
  • Tips are 4” in size and are constructed of chrome-flashed 304 aluminized stainless steel
  • Utilizes OEM hangars and mounting points for easy installation
  • Requires no cutting or welding
  • Compatible with the factory Ford bumper ONLY
  • Does not fit the Roush rear bumper
  • Includes all necessary hardware and instructions
  • Backed by Roush Limited Warranty
  • Part #421915

More Roush parts for your Mustang

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