Originally posted by sinfestboy
dyno it, put on the exhaust, dyno it again. you wont lose a single lb. ft of torque, actually, you will probably gain some above 5-6 rpm
That is incorrect. You drive an N/A teg with no other mods with a 3" cat-back and tell me that it does not feel slower. You will lose torque, not to mention the majority of the backpressure that you'd get from a smaller diameter exhaust. You do need some amount of backpressure...it's not always a bad thing.