S&S Cycle 910-0281 Big Bore Cylinder Kit Wrinkle Black - 111ci

The S&S Cycle 910-0281 is a complete big bore cylinder and piston kit designed to increase engine displacement to 111 cubic inches on 1999-2006 Harley-Davidson Big Twin motorcycles. This performance upgrade kit features premium 4-1/8 inch bore cylinders with a durable wrinkle black powder coat finish.

Key Features:

• 4-1/8 inch bore cylinders constructed from premium aluminum castings with cast-in iron liners
• Forged flat-top pistons with rings and wrist pins included
• Complete kit includes cylinders, pistons, rings, and gaskets (head, base, and exhaust)
• Durable wrinkle black powder coat finish with highlighted fins
• Machined with stock bolt pattern for use in stock crankcases
• Compatible with stock or S&S cylinder heads with stock bolt pattern
• Made in the USA

This big bore kit provides excellent performance gains with stock cylinder heads and features easy installation—no need to split cases, though crankcase boring is required to accept the larger 4-1/8 inch bore cylinders. For optimal performance, S&S recommends pairing this kit with appropriate camshafts, a performance air cleaner, performance exhaust, and proper fuel system tuning. Installation requires a skilled technician to verify all clearances and assembly specifications.