Patent ID: 7383919

Claim:
A high performance exhaust system for removing combustion gases from an internal combustion engine comprising: a shell; a tubular chamber within said shell; a sleeve in said shell; sound suppression materials in said sleeve; said tubular chamber having a substantially constant interior diameter and being perforated with apertures to about 40-80% porosity; an inlet tube subassembly fastened at its one end to one end of said shell in communication with said tubular chamber; an outlet in said chamber remote from said inlet tube for permitting combustion gases to exit said system; a single rotatable propeller type blade assembly in said inlet tube having its blades arranged substantially inclined in a spiral twist relative to the path of said exhaust combustion gases, said rotatable propeller assembly being seated in but not blocking said chamber and capable of rotation when said combustion gases pass from said inlet tube into said tubular chamber, rotation of said propeller assembly inducing passage of exhaust gases through said expansion chamber to exit through said outlet, the length of said chamber being substantially greater than its diameter, said chamber having a flow cross section substantially 75% to 90% greater than the flow cross section of said inlet tube, so that gases entering said chamber are swirled into a tightly spun vortex thus creating a vacuum drawing gases through said chamber at an accelerating rate to exit said outlet.