hollow out the cat?

[89IROC&RS]

post count????? hmmm..... looks at sig

but anyway, why is it that everyone looks to hollow out the cat, it dosnt do much cept kill your chances of passing emissions, getting a high flow cat from random tech or something will give you just as much flow, and still pass the sniffer, if you are worried about exhaust backpressure, then go with headers, high flow cat, and a single 3in pipe out to an aftermarket muffler and 3in tips. Flowmaster, GMMG, Magnaflow, Borla, Corsa, are all valid options. go to their websites, and listen to sound clips of their products, and decide for yourself. although, i offer a peice of advice. dont judge based on how your laptop or PC speakers sound. wire your computer to a real sound system and play the sound file through that. this way youll have a better idea of what it will really sound like.

[z28 boy]

But it made my car sound really cool. I turned it on when we had the cats off man an ls1 sounds killer open header thats all i got to say.

[89IROC&RS]

to be honest, i bought my IROC with strait pipes, no cats at all, welded up strait pipe. I have sense then put on headers, a high flow cat, and a flowmaster american thunder catback, and it sounds MUCH better than it did before, and its louder. go figure.