i'm looking to buy a Cometic HP Style head gasket, but they are asking for the stock bore of my engine... can anyone tell me what the stock bore is.... i did some searching and and said it was 75mm... is this right or wrong.... also.. i'm about to buy this cometic head gasket for my z6 turbo.... are these gaskets good.... planning on buying a .57 inche gasket from nippon power... thanks...

 

yes 75mm is a stock bore. why not simply use stock oem Honda gasket, stock c/r is low enough and they are tough enough to handle 10psi boost for good periods of time.

 

uhmm just wanted to buy something good......ok thanks for the help