Spyke, starter ring conversion kit 102T to 66TConverts from 102 tooth to 66 tooth. Consists of a starter gear and starter ring gear. Can be used with all Spyke starter motors. Will convert from the standard 94 06 102 tooth to the earlier ring gear design with 66 tooth. The early 66 tooth design will withstand high torque starters; large displacement & high compression engines better than the late 102 tooth design.