Major and minor valve seat diameters are most easily checked for consistency with a pair of dividers during seat grinding operation. This assures proper seat width. The answer to the question posed by ...

Thunder Power's 4-valve cylinder head conversion for big-block Chevys bolts right onto production iron or aftermarket aluminum cylinder blocks. The heads even have the necessary bosses to add an extra ...

Aftermarket cams can increase airflow by keeping the valves open for a longer period of time (more duration), or by just pushing the valve farther into the combustion chamber (more lift). Be warned, ...