There is no replacement for displacement' is the mindset we have lived by for over 25 years in the V-Twin industry. Rocket Cams is proud to introduce their high quality and durable Cylinder and Piston Big Bore Kits, with all components made right here, in the USA! The cylinders are casted from premium materials and perfectly fitted and matched to their paired up Wiseco pistons sets. Rocket Cams Cylinders come power coated textured black with machine fins, for a perfect blend to an OE Harley motor. All kits come with Cometic head and base gaskets and are ready for install. This ultimate combination of industry leading manufacturers and experienced racers, will bring bolt on horsepower to a new level. See the chart below for our cam and component suggestions to get the best results and customer satisfaction.