Hydraulic Roller - Xtreme Energy Computer Controlled: Good for TPI 305 or 350 with upgraded exhaust and custom tuning.; 269/276 Advertised Duration, 218/224 Duration .050", .495"/.503" Lift, 112 Lobe Separation; 1500 to 5500 RPM range; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump;
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