Feuling holds more than 100 patents in the automotive industry, with R & D contracts with companies such as Chevrolet, Chrysler, Ford, Harley-Davidson, John Deere, Nissan and Oldsmobile. He developed four-valve heads for Harley-Davidsons and later sold the rights to Ultra Cycles. He also designed an engine for American Honda’s high-mileage streamliner that delivered a whopping 500 mpg at 55 mph. He holds several land speed records, including one for a motorcycle streamliner at 333.847 mph (set at the Bonneville Salt Flats in Nevada, on October 20, 1999). Feuling R&D’s 28,000-square-foot facility is chock full of CAD/CAM/CAE machinery, making the company one of the few private facilities in the world that can design, test and build entire vehicles (including the engine and drivetrain) under one roof.