GP9RM 4117 was built by GMD in London in June 1956 (serial number A849) as CN 4491. It was upgraded in September 1989 and re-numbered 4117. Rated at 1800hp, 1342 kW.

GP9RM 4117 & 7059 are switching cars at Aldershot yard and are seen at the west end lead track on Wednesday March 29th, 2006.