No Springs Required. These cams are compatible with your stock factory valve springs, so there's no need to remove and replace your 24 stock springs, saving you time and money.
Application. Comp Cams Mutha Thumpr Camshafts are sold as a pair for your 2005 to 2010 3V 4.6L modular powered Mustang, including both the GT and Bullitt models.
Technical Note. The installation of these Comp Cams will require a phaser limiter kit and custom ECU programming.