The headers have gone on perfectly. I had to ding one little spot to get a wrench on a bolt, but no other issues. The tubing is thinner than SS headers I have made or bought in the past. I will be interested to see how long it will be before it cracks. I am not sure if the cracks will be because of material or overall design. In my opinion, the turbo side header is not braced. There needs to be something supporting the turbo other than the header. ALL turbo headers can/will crack at some point. It just depends on EGT temp, pressure, and fatique. The welds on most of this stuff are amazing. I don't see weld quality being an issue. The down pipe and crossover were a PITA. The CO pipe didn't fit very well on my stock motor. The sway bar hit on the driverside. In the center of the pipe the flex joint/socket/flange was off a good bit. I had seen pics of other cars that showed the CO hanging down a bit. I can see why now. I had to pry and force it all into possision. It's on but it was not fun. I have had similar probs with other kits and to be honest with stuff I have made myself. The next time I take it off it may fit better. (after a heat cycle) The WG is on the CO pipe. The ? is not if it will fall off, it is when. I have never, ever, ever, seen an unsupported WG stay on. There is too much weight and heat there for it to live hanging freely. I will try to post a pic of a proven method of bracing a WG. The DP was bent perfectly, however for some reason the v-band flange was welded crooked. Not really a big deal but I did have to cut it and reweld. Other than that it was great. I cannot understand all of the o2 bungs in the headers. I have never put them before the turbo. Does anyone else have an opinion on that? I will continue as time allows.