captainstalin`

iTrader: (5)

ok so ill be putting a header on my d.d. and i noticed the set i bought came with a race pipe that attaches to the resonator and deletes the cat. there is no bung for the second 02. would this cause problems with the engine? do i need a tune for such a tiny engine? ohv 2200 speed density tune in a 99 cavalier. if i were to just cut the pipe and put a hi flow cat would i need a tune? just for clarity this header is only for better mpgs, not to make it sound like a race car.