Machined from hardened steel alloy and fully compatible with the stock Polaris timing chain (BC has new Cloyes timing chains also, see below), the BC adjustable cam gears for the Polaris RZR platform are the perfect way to gain top end or low end torque depending on how you dial in the gear settings. Separate intake and exhaust gears to avoid confusion, these gears allow for 5 degrees of advance or retard for both intake and exhaust cams with easy to read indicator marks. If running with BC cams, which feature 4 bolt holes per cam, the cams feature an indicator line for easy adjustment. If running, stock or another brand of cams, use only 2 bolts and make an indicator mark using a Dremel or scribe for accurate adjustment. Includes 4 ARP stainless steel bolts per gear for added clamping security. Fits all XP Turbo, XP1000, XP900 and 570 models.