[nonovurbizniz]

my theory is the cheaper the better... the flow really isnt that important... the cat provides ALL the backpressure so a cat back just frees it up behind the cat...

obviously don't go with crap brands but any reputable company is good..

brospeed
brosal
trust
dynomax
magnaflow

etc etc....

I'm getting my next one custom bent at a mineke around here... they put in dynomax mufflers and resonator.. all welded. (lots of muffler shops suck and do crappy work this one is VERY good and has and EXCELLENT reputation... a custom mandrel bent exhaust from them is cheaper than ANY mailorder one.)

I'm sure a dyno will show 1 is better than another but do you really want to pay 300 bucks for 2 more or even 5 more horsepower? If any of the companies guarantee a certain life out of it it may be worth the extra cost but otherwise I think it's like buying air jordan sneakers... it's just fashion and brand worship.