Chevrolet Gen III/IV LS-Series 3-Bolt Advertised Duration: 290/290 Duration @ .050": 242/242 Valve Lift w/1.70 Rockers: .625/.625 Lobe Separation Angle: 115 Intake Centerline: 111 Valve Lash: Hyd./Hyd. 2800-7400. Competition, large cubic inch, needs aftermarket heads & intake, plus higher CR.
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