Hastings Piston Ring Set For Harley EL 1936-1952 Features Hastings piston rings sets are replacements for OEM ring sets 61 and 74 FLH types will fit J&P Cycles pistons 74 FL type will fit OEM pistons or any J&P Cycles cast piston Rings sets include cast compression rings and a 3-piece oil ring for 61 OHV and 74 FLH modesl 74 FL rings have one-piece oil control ring