The headers and x-pipes were installed on my 2014 GT for a little over a year. There is absolutely nothing wrong with them. My GT made 465RWHP with these and the CJ manifold installed. Check Alex Walton on youtube to see the dyno. I switched them out for a pair of Kooks 1 7/8 trying to squeeze out a little more power. $500 for the headers and BOTH x-pipes. Buyer pays shipping Pictures by request because I cannot seem to post them in this thread.