Stock or 4-1/8" bore crankcases to be used as a foundation for a custom engine or replacement for T111, T124, or T143. Stock looking, but stronger; thicker wall sections and superior 356-T6 aircraft grade aluminum. Tough powder coat finishes. Reinforced front motor mount for extra strength. Timken® sprocket shaft bearing – Strong enough for the most demanding applications. Clearanced for strokes up to 4-3/16" and cams up to .720" lift. Includes pinion and Timken® bearing. Manufacturer's Statement of Origin (MSO) included. Includes studs and cam bearings installed. Crankcases are specially machined for the new S&S oil line installation kits sold separately. Made in the U.S.A.. Requires Oil supply line installation kit PART #s 0950-0848 or 0950-0849..