This is a hydraulic lifter camshaft for an LA. Duration at .050" is 222 degrees on both intake and exhaust. Lobe lift is .3114", resulting in a gross valve lift of .467" with the standard 1.5:1 rocker arms. Lobe separation is 110 degrees. Cam timing at .050" is: intake opens 6 BTDC, intake closes 36 ABDC, exhaust opens 46 BBDC, exhaust closes 4 BTDC. Basic power range was 2400-5400 RPM. It will be down on vacuum a 3-4 inches from stock. Regards, Chase