S&S Cycle 910-0401 Bore Cylinder Set Wrinkle Black Twin Cam - 4-1/8in

The S&S Cycle 910-0401 cylinder set features a 4.125-inch bore and is specifically designed for 124" Hot Set Up Kits used in 1999-2017 Harley-Davidson Twin Cam engines. These cylinders have a stock bolt pattern, are bored slightly under nominal size and are not honed, and require crankcase machining for installation.

Key Features:

• Constructed from premium aluminum castings with cast-in iron liners for optimal heat dissipation and durability
• Wrinkle black finish with machined edges for a premium appearance
• Sold in pairs (front and rear cylinders included)
• Compatible with 4-5/8" stroke length for 124 cubic inch displacement
• Made in the U.S.A.

Crankcases must be bored to accept the larger 4-1/8" bore cylinders. This project requires a skilled technician, and it is the responsibility of the person assembling the parts to check all clearances and assembly specifications. Cross-reference: Drag Specialties part number 0931-0687.