In the late 1980s, Mountune started preparing Cosworth YB engines for numerous motorsport championships.

David Mountain quickly realised the potential of this twin cam, 4 valve turbocharged engine and started development for race and rally applications.

In the early ’90s, Group A rallying was the pinnacle of its sport and the works Escort Cosworths were all powered by Mountune built, 2-litre Ford YB engines.

To date, Mountune has supplied engines for road and rally racing, supporting championship teams from Ford, Formula Palmer Audi, Ascari and Petronas/Proton.

Drivers who have used Mountune engines include, Robb Gravett, Stig Blomqvist, Colin McRae, Mohammed bin Sulayem, François Delecour, Carlos Sainz Sr., Malcolm Wilson, Pentti Airikkala, Robbie Head, Miki Biasion, Gwyndaf Evans, Juha Kankkunen, Tommi Mäkinen, Guy Smith and Tom Chilton.