S&S CYCLE Crankcase - Black 310-0878

If you're building a high-performance engine or replacing a worn crankcase on a Harley-Davidson big twin, the S&S CYCLE Crankcase gives you the strength and precision you need without compromising the classic look of your machine. Built from 356-T6 aircraft-grade aluminum with reinforced wall sections, this crankcase handles aggressive cam profiles and extended strokes while resisting the punishment of forced induction and high-RPM applications. Whether you're a professional racer or a dedicated builder, this is the foundation that won't let you down.

• 356-T6 aircraft aluminum
• Thicker wall sections
• Reinforced front mount
• Timken® sprocket bearing
• Stock appearance
• Tough powder coat
• Clearanced 4-3/16" stroke
• .720" cam lift compatible
• Includes pinion shaft
• Cam bearings pre-installed
• Studs pre-installed
• Fits T111, T124, T143
• Machined for S&S oil kits
• Made in U.S.A.
• Requires oil line kit
• Manufacturer MSO included