Ford Mustang 2005-10 Headers - Stainless steel headers with 3'' lead-pipes to connect to factory exhaust system. 3/8'' thick flanges and smooth flow collectors. our Mustang headers offer the best fit, ground clearance, construction and performance available! Combined with our 3'' exhaust, and a proper tune, numerous customers have seen gains of over 30 RWHP and 30 RWFT# over stock. As seen in 5.0 Mustang magazine!