G-Force Technologies

G-Force was purchased by Élan Motorsport Technologies in 2002 and all manufacturing was moved to Elan's facilities in Braselton, Georgia.

Ken Anderson would leave to form Falcon Cars with Michael Kranefuss to build a competing chassis for the 2004 IRL season.

Nissan, believing that a purpose built prototype would be superior to an evolved GT car, decided to go the route of an open cockpit.

Nissan would also buy a Courage C52 chassis to run under their own team in order to have reliability in case the R391s suffered from mechanical gremlins, with Le Mans being their first race.

G-Force chassis won the Indianapolis 500 in its first attempt in 1997 with Treadway Racing's Arie Luyendyk, sweeping 1–2–3 finishing positions.

G-Force would again visit victory lane in the Indianapolis 500 in 2000 with Chip Ganassi Racing's Juan Pablo Montoya.

[4] During the 2005 season, teams started to abandon the chassis (in favor of the Dallara) as it became increasingly unstable in traffic at Indy.

The GF09 competed for the final time at the 2007 Indy 500 with two small teams, Playa Del Racing and Chastain Motorsports.