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Well if you go turbo the big exhaust will benefit you even more. So you can go big exhaust now, as long as it's not too loud for you. my cam specs (both intake and exhaust) :... Do you know what the stock cams are? It's useful to know where you are against a known starting point. I...

I'm late to this thread but here are some comments. This stuff I gleaned from "four stroke performance tuning" by A G Bell and from playing with "Dyno 2000" engine simulator. 1) cams with lots of overlap need tube headers to work properly. Overlap allows the exhaust gas to scavenge and suck...