cats are quieter, more restriction in exhaust. a lot of the sound will depend on the cat back you have though. the Cats will usually quiet the raspyness of most exhaust systems.
__________________ 2001 WS.6 A3 Black on Black. ASC# 4231
Tv2 cam, stage 2.5 ls6 heads, Moser 12 bolt and some juice
98 dodge Ram- the DD and pull  |