S, crankcase oil drill jig 518150 fits 36-91 Big Twin with S oil pump (NU) Used for drilling or plugging operations in some applications when installing an S oil pump. Manufactured from hardened steel. Δείτε περισσότερα στον κατάλογο V-Twin; Workshop Home > Workshop > VTwin Tools > Engine Lower End > S, crankcase oil drill jig