I already have a 1" spacer. Mine could be tuning related. It has EFI and I haven't messed with it at all yet. Yesterday, when I was getting it up to RPM in the garage in N, easing into the gas, I could see the tach stumble right around 2500. It would drop to 2k and then it would rise back up to whatever RPM I was after. I didn't notice this when I would rev, but easing in it was noticable.
