Andrews 54H Series Chain Drive Camshafts For Harley Andrews Products is recognized throughout the motorsports world as an industry leader and has been since 1972. Andrews utilizes state-of-the-art engineering, design and manufacturing technology for producing superior quality camshafts for the performance motorcycle industry. Features: Only the best alloy steel billets and heat-treating processes are utilized Made in the USA 54H Cam Specs: Specially designed for 96-103 engines with compression ratio up to 10:1 Peak rpm range of 2200-5600 Intake open/close 16/42 Exhaust open/close 43/15 Intake duration 238/273 Exhaust duration 238/273 Intake lift at Tdc: .165 Exhaust lift at Tdc: .158 Intake lift .555 Exhaust lift .555 Uses stock springs