I had jet hot do a set of new super comps about 10 years ago. As soon as I started the engine all of the coating on the bends flaked off. When I called them I was told no problem send them back and we will recoat them. I asked if they could be sent back the next time the engine was out. I was told no problem they have a life time warrenty and the problem was noted on there computer. Two years after I called to tell them I was going to send them back and they said I would have to pay for new coating it was no longer covered. The last set I had done at johnsons powder coating in nj with no problems.