I can't tell.. They look silver ceramic and don't have heat shields. I bought it with the exhaust already on. I wonder because I received my Vito jet kit. It recommends with slip on pipe and open air box.. 150/155 3rd clip. full exhaust and open box 155/160 clip in 4th. You guys gave me advise on another thread.. 160/165, 25 pilot not sure which clip? Also the fuel mix screws these come with look good and should allow me to adjust without a tool. Start these in and back out from there? Thanks again for the advise just want the best recommendation to save me time. My house is at 200' I ride at sea level and have an outerwear box cover and Uni foam filter.