Shortly after recieving our 1st patent (#5,371,331; 12/94) we started production on our unique intercooled resonated tip that lowers exhaust noise without any loss of power. In April 2005 we came up with our latest and greatest product - The Tornado Muffler (U.S. Pat # 7,331,422) that converts the heat and sound energy in the exhaust system to supercharge your exhaust for better gas mileage, sound and performance that has no comparison!