The EVB drive is one of our original closed primary belt drive designed for bolt in application. Our Clutch basket features 12 cylindrical replaceable clutch dogs, which allows our clutch plates to maintain constant contact. Our Kevlar clutch plates give the maximum performance. The polished pressure plate uses nine shoulder bolts and springs so you can adjust your clutch pressure by simple removing or adding springs and shoulder bolts. This kit is for 1979-1983 rear chain 5-Speed Shovelhead models.