Hydraulic Roller - Xtreme Fuel Injection (XFI): Excellent top end power. Needs headers, gears, and 2500+ stall, and custom tuning.; 292/300 Advertised Duration, 242/248 Duration .050", .584"/.579" Lift, 113 Lobe Separation; 2200 to 6200 RPM range; Recommended use with 1.6 rocker arm ratio; Must use bronze tip fuel pump pushrod when using high pressure or high volume pump
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