Lonestar Racing Trailing Arm Mud Flaps Pair. Fits: Polaris RZR Pro XP.The LSR mud flaps for the RZR Pro XP are a bolt on unit that make a great addition to the stock trailing arms. These durable flaps feature chromoly brackets and help to protect the trailing arms, rotors and cv's from rocks and debris. ATV Galaxy is an Authorized Lonestar Racing dealer located in Irvine California. Listing and template services provided by inkFrog.