Hydraulic Roller - Magnum: High performance street use. Aftermarket intake, headers and 2000+ stall, 3.40 to 4.10 gears. Mild rough idle.; 280/280 Advertised Duration, 224/224 Duration .050", .525"/.525" Lift, 110 Lobe Separation; 2000 to 5500 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;
