Sealed Power pistons

I did the same kit on the first 318 i rebuilt. It's good for stock applications, but for performance it keeps the piston .080" to .100" in the hole. For 318s i like the KB-167 hypers for a mild performance build. They'll give you about .011" in the hole, so if you plan on running a head with say 69cc chambers and a .026" compressed gasket you'll still get about 9.40:1 compression.

Anyway, I did use the whole Sealed Power package and for what i was doing at the time i have nothing bad to say about it.