The S&S Super Stock alternator style crankcases are perfect for stock replacement and for high performance applications. Pre-clearanced for strokes up to and including 5 inch. S&S Super Stock crankcases are compatible with stock 1970-1999 flywheel assemblies, primary covers, gearcovers, and clearanced for 38 amp alternator stators. 1970-1984 big twins. Natural finish. Available for stock, 3 5/8", and 3 13/16" bore applications.

Stock. . . .31-0003
3 5/8". . . . 31-0004
3 5/8"Bore (small diameter). . . .31-0071
3 13/16". . . .31-0030

NOTES:1981-'84 style oil pump. Includes primary scavenge port machining. Machined for 1970 & later alloy primary.