The boys try to speed up the Australian postal service by holding a mini grand prix on Honda CT110 motorbikes - the traditional bike of the Australian postman.
With help from Mark Webber, Jamie Whincup and Casey Stoner, its time to find out who will win in the battle between motorbike, supercar and Formula 1 car.
Mark Webber in a F1 car races Casey Stoner on a Motorbike and Jamie Whincup in a V8 Supercar at the Top Gear Festival in Sydney.
