So about five months ago I decided to get LT headers, High flow cattted x-pipe, Magnaflow cat back, JLT Cai, and a custom tune on my 07 Mustang GT. It took my installer 4 3/4 months and a lot of phone calls from me to get the intake and magnaflow cat back. He claimed to be a dealer for ARH and Kooks but said both companys had a two month back log that the Kooks headers he got were defective and had to send them back three times, well He isnt a dealer for any of them apperently. I called ARH and got the headers and catted x-pipe in 1 week. Three weeks later he installed and tuned the car, and this took two weeks after he said it would take three days, the next morning I start the car to go to work and the paasenger side header leaks like crazy. I call my installer and he said just tighten the bolts its not me, I did everything right. He claims that the headers are warped and he is not going to fix the leak. So I call ARH and ask for help, Yesterday I drove to LI New York and they remove the headers and completely inspect them, They found no leakage on the drivers side but there was leakage on the passenger side not do to the headers but do to globs of RTV between the exhaust ports making a large wave affect in the gasket. They fixed thee issue and reinstalled my headers with no leaks at all, confirmed this morning after a heat cycle. I cant say enough good things about all the people at ARH, they lead the industry in customer service and quality of product. They did not have to help me but they stood by there product and took EXTREMELY good care of me and my car. I would like to thank again Nick, Mike , Anthony, and Ed as well as all the others at ARH for there help. They allowed me and a friend watch everything they did and showed me everything they found during the process. If you are in the market for headers THIS is the company to go with. Thanks again ARH.