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Home | 05-10 Mustang | Exhaust | Axle/Catback Mufflers | Roush | 2005-10 Mustang GT/GT500 Roush Extreme Exhaust 421915

2005-10 Mustang GT/GT500 Roush Extreme Exhaust 421915

Item Number:421915
Availability:Usually ships the next business day
Market Price:$519.99Our Price:$415.99
Quantity:
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  • Description
  • Reviews



Completely redesigned for maximum performance, the Roush Extreme Exhaust 421915 gives your 2005-2010 GT (4.6L V8)/2007-2010 GT500 (5.4L V8) a more aggressive growl.The Extreme exhaust uses 409 aluminized stainless steel for its durability and corrosion resistance. Fully mandrel bent pipes extend from the axle to 4 inch chrome dual wall tips with minimal flow restriction. The previous Extreme exhausts versions mufflers have been replaced with straight-through high-flow resonators. The straight through design is less restrictive and gives this exhaust a tough, guttural sound unique to ROUSH exhausts that lets people know you are driving something special. The Dual wall tips are the same design found on ROUSH 2015 Mustang exhausts, use 304 stainless steel construction and feature a special chrome flashing process that reduces cracking and heat discoloration.


This kit uses all stock mounting points and comes with hangars pre-welded. Absolutely no cutting or custom fabrication is required for a perfect fit. All ROUSH exhausts use CAD data from the original manufacturer in the design process. This ensures perfect, OEM quality fitment and painless installation.

Product Features
  • Redesigned for improved performance
  • Straight-through resonator design
  • 409 aluminized stainless steel
  • Full mandrel bending
  • Fits 2005-2010 Mustang GT (4.6L)/2007-2010 GT500 (5.4L)
  • 4 dual wall tips constructed of chrome-flashed 304 aluminized stainless steel

Ordered the cold air and tuner combo. Best tune I have had. Really woke up my 5.0

- C. Faulkner

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