Stock length base stud fits 61", 74", and 80" OHV and SV models (2.030" overall length).
Extra long base stud - 5/16" longer than late stock studs (2.390" overall length).
Note that the extra long base stud leaves approximately 1.400" above the base gasket surface with 1" of crankcase thread engagement.
Stock. . . .31-2328-S*
Extra Long. . . .31-2324-S
*Harley-Davidson® part numbers 16831-30 and 16837-30.
Note: All reference to H-D® part numbers is for identification purposes only. We in no way are implying that any of S&S Cycle's products are original equipment parts or that they are equivalent to the corresponding H-D® part number shown.
