the other day i pulled my exhaust off my SRT-4 and completly hollowed out my cat converter. i could not believe the ammount of shit that came out of it !!! yea, yea, i know "why didnt you just buy the race downpipe..." well i'm really poor and also for thoes of us living in emmissions restricted states/areas and dont know somone who can "slip it through" have to keep the cat on the car. fellow PA SRT-4 owners know what i mean with the recent changes in the state inspection laws. anyways i just wanted to report that i have been driving it for a week now and NO MIL LIGHT. thats right folks the "check engine light" has not and i repeat NOT come on. as for the improvement its obvious, the throttle responce is alot better and the exhaust sounds deeper. if you decide to do this make sure you remove the O2 sensor from the converter before you start smashing.....and out it back in when you are done.