In an attempt to displace Ford and Cosworth as the only supplier of engines in the Champ Car World Series, Judd proposed a variant of the KV675 for use in the series through an agreement with MG, who would badge the engine. The deal did not come to fruition, but the development work performed based on the KV675 to adapt it to Champ Car was transferred to sports car racing. The improved engine, known as XV675, retained the 3.4 litre layout but included technology developed from the GV series of engines to increase revs and performance while reducing weight.