I want to build my top end what's most important?
#1
I want to build my top end what's most important?
Right now sitting on 400whp in my 2012 MR. Has the rb x kit from cbrd with cobb exhaust. I wanna build the top end what's some things I can get away with not getting (yeah I'm a Jew sue me)? I know I want cams springs valves but what else should I definitely get. I don't know much about cars pls no flame
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