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 SVT Ford Lightnings. Comp Cams are designed and manufactured using cutting-edge technology and the finest engineering in the industry. Looking for that ultimate hard-hitting Lightning idle? Check out the aggressive new ThumprCams. 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!