Winters Hercules U-Joint Assembly only strengthens Winters reputation as the leader in Sprint Car technology. This heavy duty design yoke and crank flange capsulates and centers joint assembly eliminating C-Clips. Five axis CNC machined from 7075 billet aluminum. Torque Specs: During final assembly, torque u-bolt assemblies evenly to 15 ft. lbs. using Blue Loctite.Service Instructions: This is a pre-lubed assembly, do not add lubrication. Do not mix bearing cups on bearing journals. Due to the exact amount of lubrication required for each cp, cups must remain matched with cross journals. Mis-matching of cups on cross journals will result in improper quantities of lubrication in cups cauing premature joint failure. Addition of lubrication ma damage bearing cup seals leading to premature wear.Pit Stop USA offers Winters Hercules Aluminum 16 Spline U-Joint Assembly 4950-16 at low everyday prices. Be sure to check out all of our products from Winters Performance Products including Winters Performance Products and Winters Performance Products U-Joint Assemblies.