Holley
1999-2004 Ford Mustang GT, MACH1 and Bullitt with 4.6L SOHC engine, Stainless Steel - Aggressive to moderate sound
2005-2010 Ford Mustang GT 4.6L or GT500 with 5.4L Engine. - Aggressive sound
2005-2010 Ford Mustang GT, Shelby GT, GT500, California Special and Bullitt cars with 4.6L and 5.4L engines. - Aggressive to moderate sound
2011-2012 Ford Mustang GT 5.0L Coupes & Convertibles. Also fits 2012 Mustang Boss 302 model. - Moderate sound
2013-2014 Ford Mustang GT 5.0L Coupes & Convertibles. - Aggressive sound
