These have been coated with a silver thermal barrier. They have a total of about 300 miles on them, 80 since coating was put on. The cross over pipe has a oil stain on it. There is an extra o2 bung, and a small hole for a egt sensor on pass side. I'm only selling them so I can get a set of TA Perf. headers to run a bigger DP. I have extra pics if needed. $850 + shipping