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Message: <blockquote data-quote="SCL PI GT" data-source="post: 1197107" data-attributes="member: 18738">This is an awesome thread! Great information. Just to show the benefit of the PI head swap, here are the numbers I made with it. Used to have a friend that worked in a small dyno shop and sometimes would let me come by after hours and run it for free. This was a dynojet at 700 ft elevation. Also, I ditched the PI cams for Comp 262's. My runs were:Stock = 184 rwhpAfter my cat-back = 189 rwhpAfter catted x-pipe = 197 rwhpAfter PI head swap, comp cams, and tune = 265 rwhpThat's a 68 rwhp gain from the swap and tune. I'd estimate the comp cams probably gave me about 15-20 rwhp more than PI cams. So approximately 48-53 rwhp came from the PI head swap and tune. Not too shabby.</blockquote>