On some possibly bad advice from a builder, I had 10:1 Arias pistons installed in a 450whp H22 CX daily driver. I'd like to get away from race gas, or just use less. I picked up a head gasket that should lower compression to 9.6:1. Are thicker headgaskets problematic @ 18-20 lbs., if you do it right? (prep block and head surfaces and use ARP head bolts)

 

I just put a .065 Cometic on my car and plan on running 20lb, has me wondering too.

 

Anyone with any long term, 14 plus psi experience?

 

alot of people run inline pro headgasket that drop 1point in compression. havnt heard much problems from them