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.<br />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.<br /><br /><br />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.
