Polaris RZR XP 900 A-Arm Bushings (2011-2014) by SuperATVSuperATV RZR XP 900 A Arm Bushing Kit (2011 2014) Why We Make ThemWhen you're replacing a wear and tear item, it's in your best interest to replace it with an upgraded material that gives you a longer lifespan for your A arm bushings. At SuperATV, we utilize UHMW for our top of the line A arm bushing kits. Why UHMWUHMW is your best choice for long last A arm bushings. UHMW is a low wear material, ensuring you more miles than your factory bushings.