Aspen Avionics is a 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 companies main product line. Aspen was founded by former Eclipse Aviation employees Peter Lyons, Jeff Bethel in 2004. In 2007 Aspen expanded into a 27,000sqft (2,500m) manufacturing plant in New Mexico.