Andrews Ev31 Series Chain Drive Camshaft For Harley Experience the legacy of performance with Andrews Products, an industry leader since 1972. Recognized worldwide as a pioneer in racing, Andrews employs modern engineering and production techniques for the highest caliber camshafts. As an experienced rider, trust Andrews for top-notch quality and expertise to enhance your motorcycle's performance. Features: Only the best alloy steel billets and heat-treating processes are utilized Basically an Ev27 cam with timing set for superchargers or big-inch motors with 10.5+ compression ratio Super power for supercharged engines Must check coil bind, valve-to-valve clearance and valve-to-piston clearance Made in the USA Ev31 Cam Specs: Basically an Ev27 cam with the lobe timing set for superchargers!!! Superpower for supercharged engines Intake open/close 10/46 Exhaust open/close 52/08 Intake duration 236/270 Exhaust duration 240/274 Intake lift at TDC .133 Exhaust lift at Tdc: .122 Intake lift .495 Exhaust lift .495