Polaris RZR-800S UHMW A-Arm Guard Package. Factory UTV RZR 800 S a-arm guards offer the ultimate in a-arm/cv boot protection. Constructed from ultra tough and slippery UHMW these guards protects your a-arms and cv boots from the off road abuse you love to put them through 1 set of 4 guards. These are the same protection products Factory UTV Support racers use to protect their race UTV s to win multiple major Pro UTV Endurance Championship races including the Baja 500, Mint 400, King of Hammers, San Felipe 250 and Silver State 300 and BITD Bluewater Challenge and multiple GNCC races. The pro s can t afford to run less than the best protection on their UTV s, neither should you.