Quick Specs Camshaft Series: Xtreme Energy Cam Type: Hydraulic Roller Grind Number: XR276HR Basic Operating RPM Range: 1,800-5,600 Intake Duration at. 050 Inch Lift: 224 Exhaust Duration at. 050 inch Lift: 230 Advertised Intake Duration: 276 Advertised Exhaust Duration: 282 Lobe Separation: 110 Intake Valve Lift: 0.505 Exhaust Valve Lift: 0.505 Camshaft Gear Attachment: 1-Bolt Camshaft Material: Billet Steel Engine Family: Oldsmobile 260-455 c. WARNING : This product can expose you to chemicals including Styrene, which is known to the State of California to cause cancer.