S&S Cycle #91-7210 - Cylinder - 3.500" - Natural Finish - Evolution Big Twin

3-1/2" bore cylinders for Stock, S&S® Performance, and Super Stock® Heads. 1984–'99 big twins. On top of being constructed from superior materials, S&S replacement cylinders have thicker castings, larger cooling fins, and better wear resistance than stock cylinders. Super Stock® pistons for 80" engines can be used with stock 80" flywheels without rebalancing.Individual cylinders and cylinder sets without pistons are bored slightly under normal size and are not honed.

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