Aussiespeed AS0044 Chevy 194, 250, 292 4 barrel intake manifold is an Australian manufactured performance intake manifold. It has a tall plenum with a central divided that will accept Holley square bore 4150 style carburettors in both forwards or side ways positions. Is used for EFI throttle body conversions by Gill Welding in TN. Can be used with small 390 vacuum operated secondary carbs up to large double pumper engines. These are cast from premium aluminium ingots, stress relieved and shot blasted then precision machined. Check for yourself  by searching the net at the results that have been achieved with Aussiespeed performance products. The 2 barrel adapter and EFI conversion are not included in your purchase. You are buying the 4 barrel intake only. Aussiespeed also manufacture many other speed equipment products for a range of inline and v6 and v8 engines.