V-Twin Mfg. Cam Cover For Harley Knucklehead 1936-1947 Replica cam cover includes bushings and breather pipe with smooth natural finish. This OEM Replica is cast with exclusive V-Twin molds and tooling. Cam cover is an exact Replica for 1937-1940 EL models, smooth type! Bushings are included but may need reaming for proper fit. Features: Oil line fitting measures 3/8 x 28 Replaces OEM 584-36 Note: Check oil passage (drilled hole) into bronze bushings, either on existing bushings or when replacing bushings.