A new Lola, the T284 (also running a Cosworth engine), was entered by Michel Dupont Racing alongside his Chevron in the 2-litre category. Unable to secure a new 312PB from the factory in 1971, the North American Racing Team (NART) had developed their own spyder version of the 312P. This was subsequently developed in-house to PB-specification in 1972 and arrived at this year's race for Jean-Claude Andruet/Teodoro Zeccoli. The successor to the Dino 246 was the 308 GT4 and NART also prepared a special racing version using engine components taken from the 512BB and 365 GTB/4. The 3-litre engine now pushed out 250 bhp, capable of 285 kp/h (175 mph). The Japanese Sigma rotary returned with an updated model, and now with stronger financial backing from Mazda. Their drivers included the debut race for future Le Mans stalwart Yojiro Terada.