S&S 107" Big Bore Bolt-In Black Cylinder & Piston Kit 2007-2017 Big Twins (910-0500)

This bolt-in big bore kit is easy to install, and requires no machining or rebalancing. This is the largest bore (3.937") that can be fit in a stock engine case. Stock engine height is maintained so there are no manifold or frame fitment issues. The S&S 11 fin cylinder design closely resembles OEM shape and come prefinished - ready to install. Cylinders feature increased fin area for better heat dissipation, and the centrifugal cast, gray iron liner features 40,000 psi tensile strength for superior wear and performance. The pistons in this kit have a 3cc pop-up dome for slightly higher compression rato. This is one reason to choose and S&S 107" kit over the S&S 106" kit which has slightly less compression.

• Big Bore kit yields excellent results with stock cylinder heads
• This is the largest bore (3.937") that can fit in a stock engine case
• Stock engine height is maintained so there are no manifold or frame fitment issues
• Easy installation no need to bore or split existing cases, just swap the cylinders (unless otherwise noted)
• Cylinders are constructed from premium aluminum castings with cast-in iron liners providing 40,000 psi tensile strength for superior wear and performance
• For 107" twin cam motors
• The pistons in this kit have a 3cc pop-up dome for slightly higher compression ratio
• Kit includes cylinders, pistons, rings and gaskets (head, base and exhaust)
• For 2007-2017 Harley Big Twins (except 2017 Touring)
• Not compatible with S&S 79cc Super Stock™ heads
• Made in the U.S.A
• Project requires a skilled technician. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications