Trüpower Motorsports Ski-Doo MXZ, Summit, Freestyle Premium Direct Replacement Ball Joint Tie Rod Ends are manufactured to meet or exceed OE specifications following rigorous quality control and product stress testing. Trüpower ball joints will stabilize the steering system so your sled continues to perform the way it was meant to perform. Plain and simple, our Ski-Doo MXZ, Summit, Freestyle Ball Joints are built to last so you can work hard and play even harder.