Engine - Cylinder Heads - Splayed-Valve Cylinder Head

From GM Performance - The splayed-valve cylinder head has 240cc intake runners. The spalyed-valve casting has a .240 inch minimum port wall thickness that premits extensive modifications by cylinder head specialist seeking even more airflow. The intake valves are angles 16 degree to the deck surface and tilted (splayed) 4 degree. The exhaust valves are 11 degree, with a 4 degree tilt. This cylinder head has symmetrical intake and exhaust ports and can accommodate a 2.20 inch diameter intake valve and 1.65 inch exhaust valve. Its nominal combustion chamber volume is 45cc, although the actual volume will depend on the seats and valves installed.

From GM Performance - The splayed valve cylinder head has 240cc intake runners. The splayed-valve casting has .240 inch minimum port wall thickness that permits extensive modifications by cylinder he specialist seeking even more airflow.