Not sure about the Evo version, but for DSMs there are apparently super tight clearances required, the valve stem seat height needs to be exactly matched to stock spec, and you need a basic spring upgrade to rev to 8k or so. So with the aftermarket parts, you need to make sure everything is put back in at factory spec.
Quote:
Originally Posted by craig
come on get over that 400 hump
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Would be nice, but at least I know 3 or 4 of the pulls did make over 400.
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