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Cylinders have a stock bolt patternBored slightly under nominal size and are not honedDesigned for 124" Hot Set Up Kits used in '99-'17 Twin CamsWrinkle black finish with machined edgesRequires...

Cylinders have a stock bolt patternBored slightly under nominal size and are not honedDesigned for 124" Hot Set Up Kits used in '99-'17 Twin CamsWrinkle black finish with machined edgesRequires...

Complete kits include cylinder sleeves, pistons and head gasket750cc kit increase bore and stroke to 83.5mm x 67.8mm (stock is 78 mm x 67.8 mm)865cc Increases bore and stroke to 90 mm x 67.8 mm...

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersCylinder kits include matched Vertex pistons to ensure longevity, performance and...

Rocker Arm shafts, Rocker Arm Stud Kit, Head Bolt Kit and Performance Roller Rocker Arms are included in this kitRocker Arm ShaftsReplace broken or worn OEM pieces with stronger, more durable S&S...

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersCylinder kits include matched Vertex pistons to ensure longevity, performance and...

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersCylinder kits include matched Vertex pistons to ensure longevity, performance and...

Complete kits include cylinder sleeves, pistons and head gasket750cc kit increase bore and stroke to 83.5mm x 67.8mm (stock is 78 mm x 67.8 mm)865cc Increases bore and stroke to 90 mm x 67.8 mm...

The lightest rocker arm available, but still has superior strength characteristics due to its designThe strength of 660 bronze bushings and bearing-grade steel for the roller tipExtensively tested...

Kits include aluminum cylinder with nickel-carbide coating designed with larger water jacketsForged piston with molybdenum coatingSpecial gasket kitEasy-to-follow step-by-step installation...

Ready-to-install, direct bolt-on cylinders require no re-plating and look virtually identical to the OEM cylindersCylinder kits include matched Vertex pistons to ensure longevity, performance and...

Ideal engine part to complete Koso's big bore kitUnique four-valve design increases air flow and performanceProvides more power and torqueFeatures a forged piston, stainless steel 24 mm intake valves...