4.125'' bore crankcase can be used as a foundation for a custom engine or replacement for T111, T124, or T143Stock looking, but stronger thicker wall sections and superior 356-T6 aircraft grade aluminumTough powder coat finishesReinforced front motor mount for extra strengthTimken® sprocket shaft bearing – Strong enough for the most demanding applicationsClearanced for strokes up to 4-3/16'' and cams up to 0.720'' liftIncludes pinion and Timken® bearingManufacturer's Statement of Origin (MSO) includedIncludes studs and cam bearings installedCrankcases are specially machined for the new S&S oil line installation kits sold separatelyMade in the USARequires oil supply line installation kit.