Feuling 618 Chain Drive Camshaft For Harley The 618 race series camshaft is crafted to enhance the power of large displacement, high performance engines. Ideal for big bore setups, it requires upgrades such as ported heads, high flow valves, and a ported intake manifold paired with a large throttle body. Moreover, valvetrain enhancements including high lift springs coupled with performance pushrods and lifters are essential. To fully harness its potential, a high flow air cleaner, triple step 2-into-1 exhaust pipe, and the Feuling Race Series oiling system are strongly advised to maximize engine performance. Features: Aggressive race series camshaft Upgraded cylinder heads, intake, and valvetrain components are required Feuling's Race Series oiling system recommended Made in the USA 487 Cam Specs: Power range: 3100-6650 RPM Intake open/close: 20 / 42 Exhaust open/close: 65 / 19 Intake duration: 242 Exhaust duration: 264 Intake lift at Tdc: .195 Exhaust lift at Tdc: .170 Intake lobe centerline: 101 Exhaust lobe centerline: 113 Intake lift: .608 Exhaust lift: .611