These polyurethane bushings for 4-bar ends are perfect for your custom build. Bushing fits new 3/4" thread 4-bar ends noted below as well as rod ends with a 1.125" I.D. and rod end width of 1.485". The steel sleeve I.D. is 0.625", O.D. is 0.815" and the length of the sleeve is 1.76". Kit includes a set of 8 bushings with 8 sleeves. Replacement bushings and sleeves for 3/4" threaded 4-bar ends #s 910-08036, 910-08037, 910-08038 and 910-08039. Note: These bushings are not a replacement for Speedway 5/8" threaded 4-bar rod ends as they are wider. If you are trying to use this bushing kit with a Speedway 4-bar rod end, please note that it will not be a direct fit for the 5/8" threaded 4-bar ends. You will need to trim 0.435" off the overall width to match the 1.050" width of the bushing that came with the Speedway rod end.