LS1/LS2/LS6 CNC Head Package

  Fully Assembled and a true ready-to-install cylinder head package. Free Shipping to 48 states! Rated for and tested at 1200+whp 15* Cathedral Port 230CC Intake Runner (CNC Ported) 2.00"/1.60" Manley Valves Brian Crower Beehive Spring kit (Max lift .600") Bronze Valve Guides for improved valve stem life.  Newen CNC Valve seat profiles for max efficiency and concentricity.  Centroid 5-Axis ported for the most consistent runners on the market.   CNC Chambers optional* 355-T6 High Density Aluminum heads with thicker deck for boosted applications.        LS1 Flow Chart Lift Intake  Exhaust   .200" 157 cfm  116 cfm  .300"  210 cfm  157 cfm  .400"  264 cfm  195 cfm  .500"  299 cfm  217 cfm  .600"  312 cfm  225 cfm