The development of a more efficient engine was, in part, a result of the imaginative redesign of the exhaust system.

Looking to reduce engine knock, improve efficiency, offer more torque and increase performance, Mazda engineers moved away from the traditional 4-1 exhaust and developed a 4-2-1 exhaust system.

In new generation vehicles, this system allows for an efficient 13:1 compression ratio that improves both fuel efficiency and exhaust emissions, whilst reducing the risk of knocking.