HP Rating: 1200 5.650" Center to center 2.1654 / 2.1657 Housing bore (Made to fit with ACL Tri-Metal Race Series & King Bearings. Bearings will require 3/16" (.1875") drill bit for rod dowel pin alignment) 23mm Wrist pin Big end width .855" Pin end width .855" Billet aluminum Fits all EVO X 4B11 models