Fender from Polaris and exhaust from Slingmods. I called the exhaust makers, Thermal R&D, and Slingmods.com, and both couldn't do anything about this issue or make it right. Slingmods is still selling this without disclosing the incompatibility problem. Your only warning may come from this article. Hitting the slightest bump will drive your fender into the exhaust and cause it to look like the picture attached. I am very pissed off about this; after spending thousands of dollars, I am left with this. If anyone has any solutions, I would love to hear them.