Keller - POLARIS RZR XP TURBO S Mega BALL JOINTIt Doesnt Get Any Better than Mega Your Turbo S is one heck of a rig. With its extra wide suspension, you can keep the pedal floored around more often than not. But when you upgrade to bigger tires, you need ball joints that can handle it. With Kellers Mega Ball Joints installed on your Polaris RZR XP Turbo S, youll be able to take your machine to its limits and beyond without busting a ball joint. They use oversized components and a two piece design