Cat Back exhaust ?
free up air flow....realese hp... just serch the forums on this site....don't go back to the wherever you got that 100% false information...that doesn't even make sense and you should know that.
other wise I don't think so...
if your base like I was..you def. want a catback.....less restrictive/sound/appearance....
I'm pretty sure no ws6's came with any form of slp catback from the factory.
And getting back on topic, OP you will gain power with virtually any Catback system you decide to go with. To suggest a couple Hooker aerochamber, magnaflow, corsa, gmmg, slp, etc...


