These Purple camshaft kits show Mopar Performance strong commitment to racing. Theyre Factory-engineered hydraulic and mechanical Cams and lifters for modified-competition class racing applications. Theyre developed for power and RPM potential, while maintaining reliability and the best low-speed characteristics, including torque. They are also proof that the people who built your Mopar can make it perform even better. All Mopar Performance Cams are designed, developed, and dyno and track-tested by Chrysler engineers. These kits include the cam and lifters.