Hydraulic Roller - Xtreme Energy: For use in LT1 with custom tuning.; 276/290 Advertised Duration, 220/230 Duration .050", .510"/.510" Lift, 114 Lobe Separation; 1500 to 5500 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump; Steel billet version of part #07-305-8 PartNumber : cca07-305-9 Description : COMP Cams Camshaft Lt1 276HR-14 Title : 07-305-9 CamShaft, LT1 276HR-14 Engine Components::Camshafts