The CG911B was the updated version of the CG911 designed by Chris Murphy and Gustav Brunner for Leyton House Formula One team for the 1991 Formula One season. In 1992 Leyton House was rebranded as March F1, after they were sold to a consortium led by Ken Marrable, John Byfield, Tony Birchfield, Gustav Brunner and Henny Vollenberg. The car was powered by Ilmor V10 engine and was driven by Austrian Karl Wendlinger and French Paul Belmondo. Wendlinger’s 4th place in Canada was the only point finish for the team in 1992. His teammate, the son of actor Jean-Paul Belmondo, joined the team as a pay driver, getting a ninth place at the Hungarian Grand Prix, but only qualifying 4 more times. After his money run out, Belmondo was replace by Italian Emanuele Naspetti.
| Season | Series | Event |
| 1992 | F1WC | Canadian GP |
| Driver | No. | Entrant |
| Paul Belmondo | 17 | March F1 |
| Scale | Manufacturer | Collection |
| 1:43 | Spark | |
| Cat. No. | Quality | Rarity |
| S1661 | 
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