Going to be ordering a copper head gasket from summit, just wondering what thickness should I be getting?

 

Which engine? If an LT1, the stock compressed thickness is .050. GM part # 10168457.
You can also get part # 12553160 which is around .028 made for the Impala iron head LT1. That will bump your compression and h.p. slightly. But you might have to run primo gas after that.

 

yeah sorry its the lt1, thought you were suppose to run premium anyways? thanks for the response

 

Premium is "suggested" not required.