An expert racer, chassis builder and setup man, Junior has made a living from racing and building cars since the mid seventies.

Robert is a well renowned chassis builder, racer, and crew chief.

In addition, Performance Technologies had built several engines for both chassis builders (Hamke and Lefthander) clients.

The two chassis builders later parted company, with Lola developing the B05/30 and Dome continuing with the F106.

The majority of race cars and engines are imported from the USA, although some local chassis builders still exist.

Riley & Scott was among the new chassis builders selected for the new Indy Racing League in 1997.

Also, Ford's successful Formula 1 Cosworth-V8 engine was available for independent chassis builders, but vibrations made it unreliable for endurance racing.

The chassis builder and engine builder of a competing car were considered as a single entity for classification purposes.

Until recently, Formula Nippon was an open formula, where a variety of chassis builders and engine manufacturers could compete.

With long-range planning and a two- to five-year warning to chassis builders, Walker said, the improvements could be made without upsetting the sport's already high cost structure.