Cometic, cylinder base gasket set FR/RR. .020" RCS

36-47 61"/74" Knucklehead; 37-48 74/80" Flathead; 30-36 VL models; 21-29 J models (NU)

Front & rear set. .020" RCS (Rubber Coated Steel). A steel core with a .001" thick coating of nitrile rubber on both sides. OEM replacement reference 16774-21 (old 46-21).