S&S, 3-1/2" replacement cast piston kit. Std - 84-99 Evo Big Twin (NU) A19 for easier installing

for easier installing

Note: See 514569 for the OEM style floorboard adapter used with OEM exhaust sytems

88" (4-1/4" stroke

045" head gasket with firering and silicone bead

Sized to fit your stock fenders and as sticky as chewing gum

S&S, 3-1/2" replacement cast piston kit. Std - 84-99 Evo Big Twin (NU) A19 for easier installingStock replacement cast flat top piston. An excellent choice to overhaul your stock Evolution Big Twin. 3 1 2" " bore with stock 4 1 4" stroke. With standard 8. 5: 1 compression ratio. Pistons include wrist pins, wrist pin clips and piston rings. Note: In any and all applications the technician must be able to judge components for their suitability in combination with the other engine components, prior to installation. It is of importance that a