Patent ID: 8276375

Claim:
A method for providing a downward force on a vehicle powered by an internal combustion engine, comprising steps of: (a) at an engine exhaust gas outlet port, joining a downforce hammer securely to the port, the hammer closed by a surface positioned at an adjustable step distance below the lowest extremity of the port, such that exhaust gases leaving the port expand over said step distance before striking the closed downward-facing surface of the downforce hammer in the downward direction, the hammer open in the upward direction; and (b) operating the engine to produce exhaust gases exiting the exhaust port, such that the exhaust gases expand freely in both an upward and downward direction; wherein in step (b), the downwardly expanding exhaust gases strike the closed downward surface of the hammer, creating a downward force imposed upon the hammer, said downward force thus transferred to the port, engine and vehicle.