The 308B was the updated version of the first Hesketh – the 308 constructed in 1974. Hesketh’s designer Harvey Postlethwaite revised bodywork and repositioned oil radiators. The car was very competitive, and James Hunt took first team’s victory in the 1975 Dutch Grand Prix. Works team entered two cars in the 1975 – for Hunt and Brett Lunger, and also prepared few cars for privateers. British ex-racing driver Harry Stiller bought one of the chassis and put Australian rookie Alan Jones into the cockpit. The team called Custom Made Harry Stiller Racing took part in four World Championship races. Jones retired in first three of them, and finished 11th in Sweden.
| Season | Series | Event |
| 1975 | F1WC | Monaco GP |
| Driver | No. | Entrant |
| Alan Jones | 26 | Custom Made Harry Stiller Racing |
| Scale | Manufacturer | Collection |
| 1:43 | IXO | Formula 1 Auto Collection |
| Cat. No. | Quality | Rarity |
| No. 99 | 
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