Check with Exhaust Pro's in Thornton. I spoke to them about the DT shorties and welding on the Cats (2006 4R limited v8) because I had error codes. He might be able to answer questions about the DT Long tubes. If I remember correctly I asked about different cats than the OEM ones and he was...
4th gen v8 exhaust colorado
I have the dredded codes for bad cats. Has anyone just replaced the o2 censors and it cleared the codes? I'm also looking at the URD Cat back exhaust but not sure if it will pass emissions even after I replace the front cats.
any help would be appreciated.