So this was one of those, "clearer instructions please" situations would have been nice in the box. Glad i wasnt fighting this under the hood or wrenchs would have become projectiles lol The fender pipe kit for 400 series turbos comes with everything you need to mount to a 4" outlet turbo, problem is the vbands are not marked ir at leadt not that i could see, and took a sec to figure out which ones where the right ones to clamp to the turbo.