Hydraulic Roller - Xtreme Energy: Works well with large c.i. engines. Great for bracket racing with all upgraded parts, needs 3500+ stall.; 300/306 Advertised Duration, 248/254 Duration .050", .560"/.580" Lift, 114 Lobe Separation; Adjustable valve train required; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;
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