Hydraulic Roller - Xtreme Energy: Pro Street, bracket racing, 10:1+ compression, 3500+ stall, good intake, headers.; 300/306 Advertised Duration, 248/254 Duration .050", .562"/.580" Lift, 110 Lobe Separation; 3200 to 6200 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;
