Nope. I know that was the right thing to do..but almost all of them who used hicam for cps said there was no need to install any of those upgrade..bcoz they said that the cam was made with hi duration, not hi lift..some more the valve clearance is automatically adjusted since it is using hydraulic lifter, right? I did not use hi comp piston n on the second time it happened, the rpm was only 2500..btw i didnt install it myself..
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