All Balls Racing U-Joint. U-Joints are cold forged from SCM-415 steel. Precision ground journals are case hardened to HRC58-61. Pre-greased with high-temp Lithium Complex 3 grease. Zerk and grease channels in bearing cup evenly distribute grease. Includes cap plug to eliminate grease zerk for low clearance applications. Note: Honda Yoke assemblies have upgraded cross diameters from 17 mm to 19 mm. Honda yoke assemblies feature stainless steel clamps and high-quality neoprene rubber boots for long life and abrasion resistance.