1947-59 Chevy Truck and GMC Truck Tapered Roller Bearing Conversion kit is used to convert the old style ball bearings to the much more advanced tapered roller bearing. Tapered roller bearings control side loads better and disperse heat quicker than the old original ball bearings. We highly recommend this kit for your original straight axle front end. Great for use with our 1949-59 Chevy truck and GMC truck 6-lug disc brake conversion kit. Kit includes: • Inner Bearings • Outer Bearings • Races • Seals • Limited Lifetime Warranty Note: Upgrade only available at that price, when purchased with one of our disc conversion kits.