Flowtech Headers are the perfect combination of performance, quality, and value. This header fits the popular 2011-14 Ford Mustang 5.0L V8 Coyote engine platform. This header features 1-3/4 in. primary tubes and a 2-3/4 in. collector for increased exhaust flow for increasing performance, improving throttle response and providing a broad torque curve. This header accommodates all emission control devices and reuses the factory header gaskets and hardware.