Wanted to clarify, Spicer heavy duty UJoints from motorsport have very different bodies from the neapco branded "Brute Force" 1-0029BF part. Don't know who actually makes them, but you are getting something entirely different in the box when you buy a "Spicer" and a "Brute Force". Spicer has a zerk grease fitting, Neapco doesn't. Just FYI...