FastLab Yamaha YXZ1000R Rear Rock Flaps2016+ YXZ rock flap kit. Are you tired of your rear arms, springs and inner CV boots getting blasted by sand, rocks, and mud? These high coverage mud flaps will take a beating and provide the coverage you need to protect the rear suspension components. Durable 1 4" thick EPDM rubber is resistant to rocks, sand and debris while soft enough to pass over large obstacles without getting hung up. Not just mud flaps, but full blown rock flaps. The toughest