S&S Cycle 91-7710 Wrinkle Black Stock Bore Cylinder Set for Harley Evolution

The S&S Cycle 91-7710 is a premium replacement cylinder set designed for Harley-Davidson Evolution engines. When it's time to replace your stock Evo cylinders, these upgraded units from S&S Cycle deliver superior quality and performance improvements over OEM components.

Key Features:

• 3-1/2" stock bore size maintains original displacement
• Cast iron cylinder liners for durability and heat dissipation
• Reinforced cylinder walls significantly more resistant to warpage than stock
• Improved machining process ensures straighter, more consistent bore geometry
• Enhanced sealing surfaces for head and base gaskets reduce leak potential
• Better piston and ring fit due to tighter bore tolerances
• Wrinkle black finish for a classic performance look

These cylinders represent a significant upgrade over stock Harley Evolution cylinders. The sturdier wall construction resists the warpage issues common with OEM cylinders, while precision machining creates an improved surface finish that promotes better gasket sealing and piston ring performance. The result is improved compression retention, reduced oil consumption, and enhanced engine longevity.

Note: This is a cylinder set only—pistons, rings, and gaskets sold separately.