Swift DB4

It was powered by naturally aspirated 1.6 L (98 cu in) Toyota 4A-GE four-cylinder engine, producing about 240 hp (180 kW), which drove the rear wheels through a standard 5-speed manual transmission.

Vasser went on to win at Laguna Seca over a large Atlantic field in mid October.

Shelton finished second in his first outing, at Road America in Wisconsin while Greenfield also made his debut in his new car at the same race.

The original car then went to Road Atlanta with R.K. Smith driving but had problems in qualifying and only managed eighth on the grid.

R.K.Smith qualified on pole from Jimmy Vasser but Ralt RT4 driver Jeff Krosnoff held off Steve Shelton for third fastest.