When Chet Herbert introduced roller tappet camshafts to racing in 1950, he established an upper echelon of performance hardware that continues to carry that hard-core mystique. The roller tappet ...

Bigger is better, baby, and the hot rodder's battle cry is nowhere more in vogue than with the part-time engine-builder hooked on big-lift cams. But there's much more to the science of lobe crafting ...