24502517


24502517 - Splayed-Valve Cylinder Head


The splayed-valve cylinder head has 240cc intake runners. The splayed-valve casting has a .240" minimum port wall thickness that permits extensive modifications by cylinder head specialist seeking even more airflow. The intake valves are angled 16 degrees to the deck surface and tilted (splayed) 4 degrees. The exhaust valves are 11 degrees, with a 4 degree tilt. This cylinder head has symmetrical intake and exhaust ports and can accommodate a 2.20" diameter intake valve and a 1.65" exhaust valve. Its nominal combustion chamber volume is 45cc, although the actual volume will depend on the seats and valves installed.
Technical Notes: Does not include seats or valve guides. The intake valve location moves the valve .050 closer to the bore center line than the earlier P/N 10185040. The following items are available from GM for the installation of this cylinder head: Rocker arm stand P/N 10185041, Intake gasket P/N 10185042, Rocker cover gasket P/N 10185043, and Rocker cover P/N 10185045. The intake manifold and remaining valvetrain components will have to be purchased in the aftermarket or be fabricated.