Patent ID: 7669572

Claim:
An intake manifold assembly configured for use with an internal combustion engine having a carburetor and combustion chamber, the intake manifold assembly comprising: an intake manifold including an inlet configured to receive an air/fuel mixture from the carburetor; an outlet configured to discharge the air/fuel mixture into the combustion chamber; an interior wall at least partially defining an intake passageway fluidly communicating the inlet and the outlet, the intake passageway having a cross-sectional open area; an aperture in the interior wall, the aperture positioned between the inlet and the outlet and not defining any portion of the intake passageway; and a first regulator received in the aperture and at least partially positioned in the intake passageway to effectively decrease the cross-sectional open area of the intake passageway, the first regulator selectable from a plurality of regulators configured to each be at least partially positionable in the intake passageway; wherein the first regulator is configured to be removed and replaced by a second regulator from the plurality of regulators without disassembly of the intake manifold from the carburetor.