I posted last night that I'd borrowed a #8 and replaced my #12... I installed the plate in the same 'stock' location as I had my 12 in... . the truck is faster on top (say, after 1500rpm), about the same performance on the bottom end... as DonM suggested. The thing is, even though it's faster, it doesnt smoke AT ALL!! I got a little smoke with my #12, but I got none at all now... gonna push it ahead! The truck pulls like a freight train from 50-90mph, and I can get between 1100-1200' pulling a constant 35lbs of boost. I say it needs more fuel, what do you guys think?