Nice used aluminum intake manifold for 351C-4V and Boss 351 engines. This was a Ford over the counter or Ford dealer performance offering. This manifold was cast by Buddy Bar and looks on modified. Ford number D1ZX-9425-DA, this version allows the use of a square bore carburetor, which is unlike the original Boss 351 Autolite 4300D spreadbore design carburetor. Most enthusiasts were converting to Holley carburetors for performance, which would be perfect for this intake manifold. Dual plane.