Hydraulic Roller - Magnum: Street/strip applications. 3000+ stall. Use 4.10 gears, aftermarket intake and headers. Very rough idle.; 304/304 Advertised Duration, 244/244 Duration .050", .600"/.600" Lift, 110 Lobe Separation; 3000 to 6500 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;
