[rebelstang69]

About a week ago 2 of my catalytic converters were stolen off my car, and i've decided just replace the whole mid pipe. Money is an issue so i was leaning towards an o/r h because its cheap but i'm concerned about how loud it will be with my super 40 flows. Right now it is ridiculously loud with the cat's cut out. How loud would the o/r h be compared to how it is now with the cats cut out, and if i got a mid pipe with hi flow cats how loud would that be compared to the stock mid pipe. I also really like the sound of pro chambers any one had any experience with them? Please help.

[hpjunkie03GT]

Im running Prochambers with Magnaflow cats and it breaths alot better and its only little louder than the stock h pipe.

[mustang212]

if you put high flow cats its a little louder than stock but a lot less less than no cats it sounds to me like you shold do high flow cats or a prochamber

[racin366]

I'm a big fan of the prochamber. No cats is a bit louder than high-flow cats, but either way it shouldn't be too bad.