| GM LS GEN IV Single Bolt without VVT; Hydraulic Roller; 2400-7200 RPM Range; 239 Degree Intake Duration @ 0.050 Inch Lift; 255 Degree Exhaust Duration @ 0.050 Inch Lift; 0.624 Inch Intake Valve Lift; 0.624 Inch Exhaust Valve Lift; 114 Degree Lobe Separation
HYDRAULIC ROLLER-Broad top end power range for high rpm race only single bolt LS3 applications. | 
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