The mandrel bending process used for the tubes of this system maintains a consistent inside diameter through the bended area. This method allows for a significant increase in flow over stock/serrated-bent pipes. Due to this increased efficiency, both latent power and fuel efficiency are realized.

This Ford Mustang exhaust kit is made of T-304 stainless steel, providing for resistance to corrosion and staining.

This system features exhaust tips, mufflers, and required hardware for installation. The exhaust tips of this system fit (and require) the ROUSH Rear Fascia for 2005-2009 Mustangs (part #401271). This bolt-on axle-back exhaust system attaches to the factory midpipes and requires no cutting.

This is ROUSH's "Off-Road" exhaust kit for 2005-2009 Mustangs, meaning that the sound level of this system are above the levels legally required limits for production vehicles. For a system that is below the legal sound limit, a "Legal" exhaust system (part #401338) is also available. If you already have the "legal" version of this exhaust on your car and you would like to upgrade to the "off-road" system, you can purchase the mufflers of this system separately under part #401340 (this package doesn't include the exhaust tips). You can purchase the off-road mufflers for use with stock Mustang rear fascia with part #401423.

Since being established in 1976 as Jack Roush Performance Engineering, ROUSH has become the winningest name in racing, with numerous championships in professional drag racing, road racing, and NASCAR. The ROUSH company is also recognized internationally as a premier provider of automotive product development and systems integration solutions, with more than 2,000 employees in facilities across the globe. The company's success remains deeply rooted in the core values that are unique to ROUSH: reliance upon the talent of the individual, a disciplined work ethic, scrupulous attention to detail, and an acutely intense desire to be the best. As a result, every ROUSH product shares in this rich tradition of racing performance and the highest level of OEM quality and design.