S&S Cycle T-Series Crankcase 4-1/8 Bore For Harley Dyna Upgrade your Dyna engine build with an S&S Cycle T-Series crankcase engineered for added strength and durability. The 356-T6 aluminum construction, reinforced front mount, and heavy-duty Timken sprocket shaft bearing are built to handle high-performance applications while maintaining a factory-style look. Features: 4 1/8 bore replacement for Dyna models Crankcase can be used as 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 Wrinkle Black finish Reinforced front motor mount for extra strength Timken sprocket shaft bearing that is strong enough for the most demanding applications Clearanced for strokes up to 4-13/16 and cams up to .720 lift Includes pinion and Timken bearing Manufacturer's statement of origin (Mso) will be shipped separately Includes studs and cam bearings installed Requires oil supply line installation kit 10212638, sold separately Made in the USA