Hydraulic Roller - Xtreme Energy Computer Controlled: Best in high performance street and race engines. Needs intake, headers, lower gear and 2600+ stall.; 288/294 Advertised Duration, 236/242 Duration .050", .520"/.539" 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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