Industry leader in cast iron cylinder heads, intakes and exhaust manifolds. CNC machined to UnderCover Porting to your heads or ours. Porting, flow testing, ...

Here at RET we have been producing Class winning, Top qualifying and National record holding Stock and Super Stock racing engines for over 15 years. Continuous ...

Acid ported racing heads for circle track or drag racing, where the rules state no port work. How-to-book or have us do it.

We at High Flow Acid Porting are able to custom size your port for any application using cast iron or aluminum head porting, intake porting, exhaust porting.

Engine building tips, chassis secrets, cylinder heads, camshafts, porting and other racing tips you won't find anywhere else.