Guys, keep in mind, I didn't pick up anything with just adding the intake mani's at the track. I'm not sure, but without a tune, you probably wouldn't see much of a gain. At least that was my experience with them. Soon as I got the tune from Jerry (which was not even a tune for these mani's), The car picked up like an animal! It really is all in the tune, but I think the combo of a good tune with these mani's make it that much better.