man... yesterday i had a 3" pipe put under my f-body and man what a difference!!! just from going from 2 1/2" to 3"!!! you wouldnt belive it!! more hp up high!! better and quicker revs.. just awesome!! and they made it looke like that 4" pipe conversion it had a 3" ALUMINUM tip not crome tip crap!! and it got the stock placement but un shaved look instaed of slashed on the end!! i have the kit that has a 40 series muffler with a single 3" in and single 3" out!! just try 3" you'll be VERY HAPPY!! just thought i'd inform those who had 2 1/2 and were wondering if 3" was worth it!! Y E SSSSSSSS SS!!!!!!!!!!!!!!!!!!!!!!!!! BTW SOOUNDS F***** AWESOME TO GREAT RUMBLE BUT, NOT TOOO LOUD!!

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1989 firebird formula

Mods: converted from T.B.I. to a carburator 305 to a 350. Flowmater exhaust,hedman shortie hedders,202 160 (882) heads,.447/.447 lift 222@.050 duration speed pro 327/350hp cam 350 .40 over (356) edlebrock performer rpm intake and a 600 edlebrock manual choke (1405) Proform H.O. distributor slightly revised 700r-4

Future mods comp extreme energy roller cam, world products sportsman 2 heads, msd 6al ignition, billet distributor, blaster 2 coil and a 406 engine is in the works soon!!!!