Engine Family:Chevrolet 396-454 c.i. 8 Cylinder (1967-1996) RPM Operating Range:1,300-5,600 Grind Number:XE262H Cam Type:Hydraulic Flat Tappet Lifter Style:Hydraulic Flat Tappet Camshaft Series:Xtreme Energy Usage:Street/Performance California Proposition 65:WARNING: Cancer and Reproductive Harm P65Warnings.ca.gov Advertised Intake Duration:262 Advertised Exhaust Duration:270 Intake Duration at .050 Inch Lift:218 Exhaust Duration at .050 Inch Lift:224 Intake Valve Lift:0.504 Exhaust Valve Lift:0.51 Lobe Lift Intake:0.298 Lobe Lift Exhaust:0.301 Lobe Separation:110 Intake Centerline:106 Exhaust Close ATDC:23 Intake Open BTDC:25 Exhaust Open BBDC:72 Intake Close ABDC:57 Camshaft Gear Attachment:3-Bolt