Andrews S Series Camshaft For Harley Since its founding in 1972, Andrews Products has been acknowledged as a pioneer in the industry throughout the world of racing. Modern engineering, design, and production techniques are used by Andrews to provide camshafts of the highest caliber for the performance motorcycle market. Features: Only the best alloy steel billets and heat-treating processes are utilized Bolt-in Knuckle replacement cam for stock motors, smooth idle, strong pull to 6,000 RPM Knuckle equivalent of a 'B' cam Made in the USA S Cam Specs: Bolt-in Knuckle replacement cam for stock motor Strong pull-up to 6000 RPM Intake open/close 27/55 Exhaust open/close 55/27 Intake duration 262/308 Exhaust duration 262/308 Intake lift at Tdc: .130 Exhaust lift at Tdc: .130 Intake lift .370 Exhaust lift .370 Uses stock springs