COMP Cams - The Absolute Leader In Valve Train Performance. COMP Cams manufactures truly superior hydraulic & solid flat tappet, hydraulic & mechanical roller, and overhead camshafts for Late Model Mustangs and Lightnings. Whether your engine is naturally aspirated, run nitrous, a supercharger or a turbo, Comp Cams makes more horsepower than any other. Match Comp Cams camshafts up with their competition-grade lifters, valve springs, timing sets, and other supporting components, and you’ll experience the ultimate in race-winning reliability! Looking for that ultimate hard-hitting Mustang idle? Check out the aggressive new ThumprCams.