They’re great out of the box in “as cast” form. With 235cc intake runners they’ll provide ample flow to keep up with the camshaft/intake combinations of most larger displacement small block Chevy engines. For those who desire optimum performance, World Products offers these heads CNC-ported. With 250cc intake runners and enlarged, 90cc exhaust ports. The CNC ported heads also boast a larger 2.100” Manley stainless steel intake valves, so you can readily see the kind of power these designs will deliver. These are the very same heads World uses on their Small Block Chevy Engines. They’re available bare, or in three different assemblies that are designed to match your camshaft’s valve spring requirements. A multi-angle valve job and Manley stainless steel valves make the assemblies an excellent value and a real time-saver for engine builders.
HEAD ASSEMBLY BUYING GUIDE Use this guide to match your Cam Spring Specs to our Assembled Heads & choose which assembly you need from the choices below. Please Note: Bare Heads contain no Valves.
