Evolution-Style Aluminum Cylinders

Cylinder - 3.500" - Natural Finish - Evolution Big Twin

• 3.500" bore cylinders are for 80" or 89" big twins with stock, S&S® Performance, or Super Stock® heads
• Thicker castings, larger cooling fins, and better wear resistance than stock cylinder
• Bored slightly under normal size and are not honed
• Stock replacement with cast iron liner
• Includes dowel pins
• Made in the USA
• Super Stock® pistons for 80" engines can be used with stock 80" flywheels without rebalancing.