Revolution Performance, Llc Cylinder Kit - RP201-129W For Harley Motorcycles 1999-2017 Brand_Rough Crafts requires the use of S&S

requires the use of S&S manifold O-rings & U-rings (sold separately)

9/16" 12-point head with integral washer

Oil temperature sensor screws into crankcase

Housing Material Vinyl Overall Length 91

Revolution Performance, Llc Cylinder Kit - RP201-129W For Harley Motorcycles 1999-2017 Brand_Rough Crafts requires the use of S&SFeatures Aerospace grade all aluminum cylinder with nickel silicon carbide (NSC) electroplated bore NSC plated cylinders have less friction for increased horsepower, lower engine temperatures and a longer lifespan Includes pair of all aluminum NSC coated bore cylinders, custom forged pistons with high tension rings specifically designed for NSC cylinders and a head base gasket set Replacement gasket sets available separately Upgraded cylinders studs