In 1962, Chevrolet introduced double hump heads on its small-block engines. These helped shape the incredible power of ...

The core of the problem with iron small-block Chevy heads is that there aren't any (cores, that is). It is becoming more and more difficult for the professional engine builder or weekend mechanic to ...

Memphis, Tennessee, has long been the cradle of the aftermarket performance industry, second only to Los Angeles. So, it should come as no surprise a legendary name like Racing Head Service (RHS) ...

A few companies tried to market four-valve heads that retained the conventional camshaft location and pushrod design, but custom manifolds were still required, and a prohibitive bottom line doomed ...