Roush’s axle-back exhaust kit, which fits both the four-cylinder EcoBoost and the 3.7-liter V-6 Mustang, does a good job changing that. It’s definitely louder—and more turbo-sounding ...

Stage 1 adds a Roush exhaust system (prepped for Active Exhaust), body parts and a few interior bits to the EcoBoost Mustang. Stage 2 adds 20-inch wheels to the Stage 1 upgrades. The RS3 cranks ...

slightly cheaper Mustang V6 Fastback sounds a lot better. It’s a V6! And these are all factory exhausts we’re talking about. But fear not, you can always go for a ROUSH Performance exhaust ...

Our well-equipped test 427R listed for $48,691—$20,000 above the Mustang ... special exhaust and ECM; aero kit with front fascia, chin spoiler, rear spoiler and hood scoop; Roush 18-inch chrome ...

Part #421837 is officially known as “2015 Mustang 3.7L ROUSH V6 and 2.3L Ecoboost Exhaust Kit - Round Tip (304SS)” on the company’s website and you can buy the package for $571.99 ...

“The 2015 RS will be built on the Mustang’s V6 platform ... the Stage 1 and Stage 2 get the new ROUSH quad-tip performance exhaust system. “The new quad-tip exhaust is a modular design ...

Roush's 427R Mustang is an angry car. Even if you don't touch the gas pedal, the burble of the exhaust lets you know that you're driving a Mustang with a serious attitude. Directing the short ...

or possibly Roush. It doesn't matter, because the simple change in exhaust components should be enough to satisfy Editor Turner's occasional rant that the new Mustang has become "too civilized"-a ...

The package also includes a Brembo front braking system, an active exhaust, locking lug nuts, a car cover and an engine bay styling package. The Roush Stage 3 Mustang is currently available for ...