Wilson Manifolds Plenum Port w/Gasket Match intake manifold, Edelbrock part no.2925 Small Block Chevy 23° 4150 Carb flange. We will port the plenum, adjust divider walls, roof lines, taper, angles, textures, etc to pick up power and improve distribution. We port match the runners to a Fel-Pro 1206 intake gasket (very commonly used), You’re sure to pick up power and tremendously improve distribution. Special order item 3-5 business days.