Alternator Style Crankcase Assembly with Stock Bore - Natural. Fits Big Twin 1970-1984.

Features & Benefits:-

* The S&S Super Stock alternator style crankcases are perfect for stock replacement & for high performance applications.

* Pre-clearanced for strokes up to & including 5" S&S Super Stock crankcases are compatible with stock 1970-1999 flywheel assemblies, primary covers, gearcovers & clearanced for 38 amp alternator stators.

Tech Tips:-

* Stock Bore # SS31-0003.

* 3-5/8" Bore # SS31-0004.

* 3-5/8" Bore (small diameter) # SS31-0071.

* 1981–1984 style oil pump. Includes primary scavenge port machining. Machined for 1970 & later alloy primary.

Proudly Made in the USA by S&S Cycle !

MFR PART No: 31-0003

ROLLIES PART No: SS31-0003