That is a full CARB compliant catalytic converter on a home made down pipe. (I'm on the road until Thursday I can get you the numbers). I spent a lot of time trying to come up with a exhaust that would pass the NYS DOT registration requirements. So here are the good and bad of it. Good... looks good on the car, actually did the tune on the car with it and was able to get the engine idiot lights to go out. Bad... extreme heat with it on melted the exhaust insulators in a matter of minutes. So I have a call into the tuner I'm not sure if I clogged the catalytic converter on the initial start ups (fouled out the first set of plugs in the first 10 starts). Or the additional of the supercharger is just too much for that catalytic converter. So right now I'm going to reinstall it for the DOT inspection and then pull it off unless I can get it to work. The biggest problem I'm having is the tunes are completely different with the two different exhaust systems. Current tune works good with the cat'ed exhaust, but with the 3" exhaust runs good with normal driving but as soon as you really get into the throttle acceleration is definitely lacking (hesitation like the lack of back pressure is letting the power that should be going to the wheels is going out the exhaust) and if you let up on the throttle I'm getting a back fire out of it.