Quote Originally Posted by Nuci View Post
Also your oxygen sensors are located in the cat, so if you remove it then you've got to find somewhere else to run them. And without the oxygen sensors hooked up your car will throw a check engine light and run like shit.
Last time I changed a full exhaust on a DC5R the o2 Sensor was plugged in the extractor pipe. So I don't know how you found an o2 sensor on a cat? Are you talking from your own experiance? Sorry just curious.

De-cat does nothing. I had de-cat, no resonator, all on stock headers with Buddyclub spec3 exhaust and it sounded retardedly loud and all I smelt was fume in my cabin. Biggest headahce of an idea and exhaust popped way too much with exessive amount of flames/petrol.

Best thing was when I added a 200cell hi-flow cat, there was a nice difference and car still sounded nice. No fume smell, reduceded popping.