el matatan

i have an c&l racer intake with a diablosport predator and under drive pullies i have the off-road x-pipe sitting at home how much of a difference do they really make? do i need an extra tune?? it was too loud when i had them on and i didnt have the predator or intake at the time it actually made it slower

onederful100

it should give you 8-10 rwhp from stock catted h pipe. you will need a tune to turn off the rear O2 sensors or you'll get a CEL. since you got a predator you can turn them off yourself.