Description:

Lobe Separation (degrees): 122.5; Camshaft Gear Attachment: 3-bolt. Exhaust Duration at 050 inch Lift: 230, Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.562 in.. Intake Duration at 050 inch Lift: 211 int./230 exh.; Intake Valve Lift with Factory Rocker Arm Ratio: 0.562 int./0.562 exh.. Replace Part Number: 12625437, ES5437, 12689035, 12638427. Replacement For Chevy GMC 2007-2013 4.8L & 5.3L LY2 VORTEC V-8 SEE VIN #'s.