CRM1988 Posted January 30, 2011 Share Posted January 30, 2011 So what affects would it have on 90 MJ if i took the catalytic converter off and through it away? I know from other vehicles i have owned all it did to them was make for worse gas mileage.... Link to comment Share on other sites More sharing options...
89flat Posted January 30, 2011 Share Posted January 30, 2011 thats about it, but usually you won't pass emissions, but that depends on where you live if you have to or not Link to comment Share on other sites More sharing options...
flint54 Posted January 30, 2011 Share Posted January 30, 2011 Jeep part number 5200-3940 is a bolt-on resonator that replaces the cataclysmic perverter in the XJ/MJ for all export models. There's a mountain of them available in the Chrysler parts warehouse in Milwaukee. It takes a great deal of convincing to get any USA dealer to order one for you, but it can be done. However, at $80, there are cheaper alternatives. Link to comment Share on other sites More sharing options...
btm24 Posted January 30, 2011 Share Posted January 30, 2011 I did this to my old car. What I did so that if any body who owns it after me gos up to another state with inspections they would pass. I took the cat off and shook it untill all of the chunks came out. Then put it back on. It made the car a bit louder but thats about it. The only reasons I did it was because it went bad and made the car run like crap. But if the cat is still good I would leave it there. It really dose not do much. If you want it louder put a flowmaster on. It makes it sound really nice. Brandon Link to comment Share on other sites More sharing options...
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