Patent ID: 7096583

Claim:
A method for producing exhaust manifolds comprising the steps of: securing one part of a two-part manifold to a computer controlled milling machine table; Using milling cutters of various types to cut channels into the surface of the component, said channels will form part of the exhaust passageway of a complete manifold; Repeating the steps above to create a second part to mate with the first part to form a complete manifold; Aligning and fastening the two halves of the manifold together using either welding or removable fasteners; securing the assembled components to a milling machine table; using milling cutters and drills held in the spindle of a computer controlled milling machine; cutting the appropriate mounting holes into the outer surface which is to be attached to the cylinder head of an internal combustion engine; again using milling cutters and drills held in the spindle of a computer controlled milling machine, cutting the appropriate mounting holes into the outer surface which is to be attached to a turbo charger or exhaust pipe.