S&S Cycle 96 Inch Sidewinder Big Bore Cylinder and Piston Kit for 1984-1999 Harley-Davidson

S&S Cycle 96 Inch Sidewinder Big Bore Cylinder and Piston Kit for 1984-1999 Harley-Davidson

The Evolution Big Twin platform has the bones for serious displacement, and the S&S 96 inch Sidewinder kit is the proven path to getting there without exotic casework. These premium aluminum cylinders with cast-in iron liners pair with flat-topped forged pistons to bring 96 cubic inches of displacement to 1984-1999 Big Twins using stock cylinder heads – making this one of the most practical and performance-effective displacement upgrades available for the Evo platform.

Key Features

• 96 cubic inch displacement achieved with 3-5/8 inch bore Sidewinder cylinders
• Premium aluminum castings with cast-in iron liners for superior wear resistance
• Flat-topped forged pistons for reliable compression with stock 85cc cylinder heads
• Wrinkle black powder coat finish
• Includes cylinders, forged pistons with rings and wristpins, head gaskets, base gaskets, and exhaust gaskets
• Made in the USA by S&S Cycle

Technical Specifications

• Displacement: 96 cubic inches
• Bore: 3-5/8 inches
• Piston Type: Flat-topped forged
• Cylinder Material: Premium aluminum with cast-in iron liners
• Finish: Wrinkle black powder coat
• Included: Cylinders, forged pistons with rings and wristpins, head gaskets, base gaskets, exhaust gaskets
• Fitment: 1984-1999 HD Big Twins with stock cylinder heads
• Origin: Made in USA

Fitment Notes

• Fits 1984-1999 Harley-Davidson Big Twin models with stock cylinder heads
• Stock crankcases must be bored to accept 3-5/8 inch cylinders – crankcase machining required
• 4-5/8 inch stroker flywheel assembly does not need to be rebalanced
• Can also be used to upgrade an engine with an existing S&S 89 inch stock bore stroker kit to 96 inches
• Review the Fitment tab for the complete year and model breakdown