something is messing you up. i can just about that with stock pulley and tune. stock it saw almost 140. after the headers it kinda slowed it down a bit.

but after last time of doing high speed runs and on the second burst of high speed it was slowing down pretty fast while i was still in it (guess KR) so im not doing that anymore. deff not with out a scan gauge hooked up. but theres other things that could go wrong also (oiling issuies)