Quote:
Originally posted by Misundaztood
Roughly about 5-hp if your lucky. Most of that will be top-end. Unfortually, exhaust's don't do much for the non-turbos.
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I got a 98' gs n/t and I got an OBX cat-back exhaust..i got abut 15-20 hp 10 in the mid section pipe and 5 in the muffler.its a 3'' pipe and I just love the sound of it..