This 4 .425" bore wrinkle black crankcase is specially machined for the new S&S oil line installation kit for 2006-2017 Harley-Davidson Dyna models.

• Stock bore replacement for 06-17 Dyna models
• 41/8 and 4.425" 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 finish
• Reinforced front motor mount for extra strength
• Timken sprocket shaft bearing - Strong enough for the most demanding applications
• Clearanced for strokes up to 4 13/16" and cams up to .720" life
• Includes pinion and Timken bearing
• Manufacturer's Statement of Origin (MSO) included
• Includes studs and cam bearings installed

Requires Oil Supply Line Installation Kit 310-0870