only issue I've run into, is my headers were coated by jet hot, but I went to send them in for warranty 'cause they were flaking down at the Y-pipe. There was a little back and forth, saying i needed to send them to arizona speed and marine, who would then forward them on because AZS&M was the original purchaser etc etc. Well, I called AZ they said no problemo, just give them a little to get it set up and then i could send them to jet hot once they got the paperwork all finished up. Got a call later that day, everythign was a go, I double checked with Jet hot, they said A-Ok. Sent it in, and thats when the issues started. All of a sudden it wasnt ok, it was AZS&Ms problem not theirs, I forwarded them the emails between all 3 of us and took complaining to a few people for them to even look at the headers. Then they said the warranty was void because they were "over temp'd" I asked em how they could tell that, they said they went from shiny to dull, I said they did that from the moment they were put on. Basically jet hot said get lost, I told em the reason I was sending them in was the flaking, which is happening on the Y-Pipe assy. and that was still bright and shiny where it was still on. And that turned into a week long battle. They finally gave in but after a lot of headaches, and I just thought id let you know jet hot doesnt do a great job of standing behind their product. And the tactic of everything is ok until they have your stuff in their hands, and then trying to sell you the coating that should be warrantied, and when I refused was told this is the last warranty recoat I get...even if they rust out is a little shady to me as well. And oh yeah, when I got them I could already see a few rust spots starting to show through at the joints. so, just an FYI