y not just straight pipe? haha Powersticks Really dont tone or quite the exhaust at ALL! and as far as the rwhp goes. i made 10 rwhp and 5mph at the track from swapping my Blowmaster to the Hooker Aero chamber. So if you have stockish exhaust youll make some more fo sho. haha i dunno i say go with a standard 3" cat back. you can pick em up used for Not alot of money. check out LS1 Tech there on there ALL the time!
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1998 Firebird:buncha parts thats used to make it go fast..... not so much anymore. 
BAAAAAA!!!!!!
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