19433498 LS9 CNC Ported Cylinder Head
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Cancer and Reproductive Harm
CNC-ported version of the LS9 cylinder head; Flows about 10 percent more than the production head—more than 350 cfm(intake side) at .600" lift; 276cc intake runners and 92cc exhaust ports; Fits all LS engines with 4.000" bore or larger; 2.165"hollow stem intake and 1.590" solid stem exhaust valves; .550" max valve lift; D-shaped exhaust portsUsed with 12680072 Spark plugs