The concept of placing a small wheel at the end of a tappet to reduce friction has existed for decades, and in fact, roller camshaft setups have been available for the American V-8 engines we tinker ...

The LS combos have the potential to make ground-pounding power, even in almost-stock trim. As usual, our bellies weren't yet full, though, and our minds were on the buzz for something more. We just ...