Now i am stumped. After crawling under my truck,there is what looks to be a cat. Although it could be a resonator. I searched my owners manual and couldnt find any mention of one,although they state i will void your warranty and break the "sound control" law,if i modify my exhaust. I kid you not. On another forum a Ca. Cummins owner said he removed his "cat". Another member asked him what it looked like inside,his reply was something like "it has screens at both ends,and a very small opening" he also stated he took the "cat" to the muffler shop to get the replacement pipe,and the shop owner saw it and said he wouldnt sell him the needed pipe. Posted on Dieselramforums.com,about 3 pages into the 3G. Time for a trip to the muffler shop and a pro opinion. Mark.Originally posted by Greg Boardman
Sorry guys, Banks is wrong. No Cat on an 03

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