Patent ID: 7703573

Claim:
A method for reducing drag to improve the aerodynamics of a moving vehicle, the method comprising: moving a vehicle on a roadway or surface to create an airstream, wherein the vehicle has an exhaust system coupled to a tailpipe; providing the tailpipe with an elongated hollow body and a main discharge port at the distal end of the body; providing one or more secondary exhaust gas ports restricted to a leeward side surface of the tailpipe and prior to the main discharge port, the one or more secondary ports being sized to exhaust sufficient gas to increase the pressure behind the tailpipe; providing the tailpipe on the vehicle wherein the forward side of the tailpipe opposite to the secondary ports is impacted by the airstream and the side of the tailpipe with the secondary exhaust ports is shielded from the airstream by the forward side of the tailpipe; discharging exhaust gases from the exhaust system through the one or more secondary exhaust ports before the main discharge port; with the discharged exhaust gases, filling in a low static pressure area that is resident along the leeward side of the tailpipe during forward movement of the vehicle; and reducing the drag associated with the tailpipe as the tailpipe passes through the airstream caused by the forward movement of the vehicle.