Cylinder - 3.500" - Natural Finish - Evolution Big Twin Front/Rear Tires Contour uses stock springs &

Contour uses stock springs & bolts

Works with all THRASHIN® shifter pegs

45 mm billet aluminum twin tube design with 25mm piston reacts quickly for improved fluid flow

Pillion - Dyna '06-'17

Cylinder - 3.500" - Natural Finish - Evolution Big Twin Front/Rear Tires Contour uses stock springs &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