Lone Star Racing 11-551 Twin Row Axle Carrier Bearing Housing Billet. High-speed, twin row of high-load sealed bearings support the harsh environment of off-road riding or racing. Bearings are pre-greased to a specific volume for optimum performance and longevity. Include bearings, high-performance seals and center tube installed. CNC-lathe-manufactured to exact standards for precise fitments.May be used with stock axle.