Description
Roush 2005-2010 Mustang 4.6L/5.4L Axle-Back Exhaust (#421915)
Bring the legendary “Roush Sound” to your S197 with the Roush 2005-2010 Mustang 4.6L/5.4L Axle-Back Exhaust (#421915). This system is the definitive acoustic upgrade for Three-Valve GTs and GT500s, delivering a loud, crisp, and throaty exhaust note that the factory mufflers simply can’t match. Engineered to deliver an aggressive bark on acceleration while remaining refined at cruising speeds, this kit ensures your Mustang sounds as powerful as it looks.
Each kit is constructed from high-quality 409 stainless steel for the muffler bodies and finished with mirror-polished T-304 stainless steel tips. Unlike traditional “packed” mufflers that degrade over time, the Roush “hollow-chamber” design maintains its sound quality for the life of the vehicle. The 4-inch rolled-edge tips fill the rear bumper cutouts perfectly, providing a classic muscle-car aesthetic with modern durability.
Key Features:
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The “Roush Sound”: Unique hollow-chamber design creates a deep, aggressive tone without fibreglass packing.
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Flow Efficiency: Mandrel-bent tubing eliminates restrictions, helping your V8 breathe easier.
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Premium Materials: Corrosion-resistant stainless steel construction ensures long-term reliability.
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Easy Installation: Direct bolt-on design; installs in under an hour using basic hand tools and factory hangers.
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Fitment: Specifically tuned for the 2005-2010 Mustang GT (4.6L) and 2007-2010 GT500 (5.4L).
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