[Tim Corcoran]

I have been told by good authority that most engine builders prefer the Johnson Hyd Roller lifter over all others. The Comp Extreme Energy cams have aggressive lobe designs and as a result are hard on valve train components and are more susceptible to making noise, that may be fine if you don't put a lot of miles on the car but if you want better reliability you may want to chose another cam. Although not as popular the Lunati Voodoo cams, although also have aggressive lobe profile they are designed to be less harsh on the valve train because Harold Berkshire designed the Voodoo series cams to be easier on the valve train. Personally I would not put an extreme energy cam in a street car. I know many people have not had problems with them but plenty of others have.