I've got a 2001 WS6 that I bought with headers, y-pipe and amuffler. It currently has one cat left on it and I was wanting to know if I could just chop it off. Would I need to invest in some different O2 simulators, tweak something, or is it already to go as is?

 

You can remove it but you will need either O2 sims or to have the PCM reprogramed.

 

Why? As I've heard before...


"Leave the poor cat alone!"

You're really not going to gain anything from it besides not passing emissions.

 

No wait! I remember a certain guy on the forums that "gutted" his cat on his V6 camaro and it beat a Dodge Viper STR-10. So lemme think...

160 hp stock camaro

600 hp stock viper

So he got over 500 horses from gutting the cat! I'm sure more older forums members will remind me of this guys name and...LOL...his stories.

 

Yeah, but he didn't remove the cat, & gutted it. You need a gutted cat to make that sort of power. Can't just remove the cat. LOL

 

rofl thats not ever going to die.

 

LOL, I knew people would remember! Gut the cat and you'll get like low 9s on the drag...hell...maybe even 8s!

 

Passing emissions is the least of my worries. I live in Decatur, Illinois. It's this ****ty industrial town, highly polluted and they never check emissions,that's on the verge of death, basically the ******* of the midwest. The only reason I ask I that I simply want my exhaust to be free flowing as possible and I figured if I could get away with just chopping the ****er off instead of buying a high flow cat, then all the better.

 

Seriously, the cat isn't that restrictive, besides some engines will LOSE power if they don't have at least SOME back pressure.

Keep in mind that I said some engines.

 

When you say some engines is there any real way to tell? When I had my 78 Z28 and chopped off turbo's I had it actually gained horsepower, power I could actually feel, despite the fact the people were telling me it wouldn't have enough back pressure. A buddy of mine eliminated the cat and muffler on a LT1 of his and noticed a lack of power towards the lower RPM band but gained some in the upper, so once again, do you know of any way to determine what would be best for my car?