Aspen Avionics is an American aircraft avionics manufacturer. Aspen specializes in producing aftermarket EFIS display systems that retrofit into certified general aviation aircraft. The Evolution Flight Display system family is the companys main product line. Aspen was founded by former Eclipse Aviation employees Peter Lyons, Jeff Bethel in 2004. In 2007 Aspen expanded into a 27,000 sq ft (2,500 m2) manufacturing plant in New Mexico.