Fitments
36-47 61"/74" Knucklehead; 37-48 74/80" Flathead; 30-36 VL models; 21-29 J models (NU)
Part Description
S&S, cylinder base gasket set FR/RR. Micropore
Fits 3-5/16 & 3-7/16" stock bore cylinders. OEM replacement reference 16774-21 (old 46-21).