See more: CARBURETION-FUEL GROUP - MOUNTS + PARTS
Intake ManifoldS&S Style Manifolds They have an extra vacuum nipple to accommodate both the VOES and special S&S 4-1/8" bore breather system. Cylinder Length (4.763"; Size 398; Bore 48 mm); (4,995"; Size 406; Bore 52 mm); (5,013"; Size 417)