The Mildren Mono was a monocoque open wheeler racing car which was designed by Len Bailey and built by Alan Mann Racing. The car debuted in 1968 at Warwick Farm Raceway in the hands of Frank Gardner, powered by a 2.5 litre Alfa Romeo V8 engine. Kevin Bartlett drove the car to victory in the 1969 Australian Drivers' Championship utilizing the Alfa Romeo engine and 4 cylinder, four valve per cylinder Waggott engines of 1850cc and 2 litre capacity.

The Mono was later raced as a Ford powered Australian Formula 2 car by Ray Winter, finishing third in the rain-effected 1975 Australian Grand Prix at Surfers Paradise against a field comprised primarily of "Formula 5000" cars.

The car was commonly referred to as the "Yellow Submarine".