Thread: Which downpipe do I want?

get a 3" with a cat. youll regret getting rid of your cat because of the sound, smell, and dirty bumper.

Originally Posted by Bio248

get a 3" with a cat. youll regret getting rid of your cat because of the sound, smell, and dirty bumper.

Good points, I never thought about that.

Originally Posted by Bio248

get a 3" with a cat. youll regret getting rid of your cat because of the sound, smell, and dirty bumper.

Really?

-I noticed no sound difference (i'm still on stock mufflers, which are the only decent sounding mufflers IMO in a free flowing exhaust)

-For the smell, I really didn't notice anything then again i've always been around cars with no cats. But still, my car smells better than that. Plus my car won't smell like rotten eggs in the future. I honestly can't see how the smell bothers anyone though. All I can say is, stay away from Diesel Trucks (like my stock 08 Chevy 3500HD 6.6 Duramax Diesel) if a catless car bothers you that much. My catless cars smell 1000000x better than my stock Chevy.

-As for a dirty bumper, i've never had that problem on my bumper and chrome tips, and I have an Artic White car. The black bumper issue could be running too rich most likely. My other GTP (though black) the tips stay decently clean on it and I know she hot rods that car too. Oh well.


No regrets for me. I had a Magnaflow 3"/3" cat on my car, I removed it and lost some boost. Talking about a restriction! A 3" straight pipe took care of that issue for good. Gave me a nice place to install a wideband too. Win Win situation for me. When we got her car I found a nice 3" off road DP for it and installed that with the stock cat-back and nice chrome tips. Doesn't sound any different than stock....