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0603htp Hawk 12 Z

Both 64cc and 72cc combustion chambers are available on the LS7X head. With 2.20-inch intake and 1.625-inch exhaust valves, the LS7X equals the GM LS7 intake valve and beats the exhaust by 0.015 inches. Interlocking valve seats are a given, with valves this big!
World Products - LS7X - World At War

 Both 64cc and 72cc combustion chambers are available on the LS7X head. With 2.20-inch intake and 1.625-inch exhaust valves, the LS7X equals the GM LS7 intake valve and beats the exhaust by 0.015 inches. Interlocking valve seats are a given, with valves this big!  View Related Article

 

 

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