It might seem like a bad move, but there are two major reasons why automakers are fitting their cars with plastic valve ...

A small gap with big importance in the performance and health of an engine - here's everything you need to know.

Q:I have a 327 in my '31 Ford that features nearly the same cam and components as the one you referenced recently in Pit Stop (Nov. '12). Since a 1.6:1-ratio rocker arm will push the valve a little ...