Hydraulic Roller - Magnum: Great for street machines. Best with headers and aluminum intake. 2500+ stall. Rough idle.; 286/286 Advertised Duration, 230/230 Duration .050", .560"/.560" Lift, 110 Lobe Separation; 2500 to 6000 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;
