Uses 1350 series U joint. Fits Dedenbear / Reid type roller/needle bearing tailhousings. "D"= 5-13/16". Manufactured from high strength American steel forgings and through hardened. 100% machining creates a perfect balanced part. The shorter head and extra-long barrel allows this yoke to be shortened ti increase lengths for suspended dragster driveshafts. The longer driveshaft length is beneficial in reducing the universal joint operating angles. Installation - Service instructions can be found on Service Bulletin #0085.