How much power do PI cams make vs aftermaket cams. Do you guys think it's a big difference or is it just a small gain in power. I see used cams for $150 so if it's a small gain then i may get PI cams. My plan is to get a blower so it not a big deal any way. Oh ya I have Svo heads on my car now so can any one give me hp numbers for my head and cam combo PI and aftermaket. That way I can see the difference in the two.