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We are the only company to provide an OEM style, fully validated, EPA emission compliant, remanufactured engine program that runs on dedicated natural gas. Our engines are remanufactured to exacting standards and factory tested by Springfield Remanufacturing Corp (SRC), a leading, independent and experienced supplier of remanufactured engines and components to major automotive manufacturers and suppliers. SRC is an employee owned company based in Springfield, Missouri. We bring the option of natural gas to medium duty straight trucks, city tractors and school bus fleets, without compromising engine performance.