This winter i'm about to build my H22 (Head & around). Fast said, i'm gonna upgrade to Skunk2: TB 74mm, Pro Series IM, 2''½ Cat-Back, Vibrant Headers, and own a ported head(Intake & Exhaust) with oversized S2 Valves and valvetrains. I was thinking going with Pro 2 cams with OEM pistons which I figured out might be a bad idea.

Any ideas what pistons I could get? Because I want to at least go with Pro 2 cams

 

With oversized valves and pro2 cams, I would look at a forged piston that will clear them well, either Mahles for stock block, or sleeve it and go for any choice of forged piston.

 

Um. Skunk2 does not recommend you to run oversize valves when running Pro2 cams; otherwise, you'll experience V2V clearance issue.

 

I asked them and they said it was fine! That I just needed some higher compression pistons. To go at least 12.5:1 but 11.5:1 looks fine. I also saw TypeS could do the work instead of Mahle pistons. Any experience lived with one of thos two pistons, anyone?

 

^ im curious of this as well, i am looking to swap to Type S pistons on a relatively stock setup, unless theres a better OS piston to run on again, a mostly stock setup.