McLaren will supply standard electronic engine control systems to the NASCAR series from 2012.
At the Singapore grand prix, NASCAR vice chairwoman Lesa Kennedy’s attendance coincided with rumours the American series was set to arrange the deal.
The contract is with Woking based McLaren Electronic Systems, who also supply mandatory electronic control units to all the formula one teams.
"To have earned a role as a standard equipment supplier to the two most important motor sport series in the world is an incredible achievement for us," said MES managing director Peter van Manen.