The dominance of the RS500 in Australia was at its peak in 1989 and 1990. At Bathurst in '89, 9 of the 10 cars in the Top Ten shootout were Sierras, and the following year it was 8 out of the 10. Of course, in 1990, all the Sierra teams charged off and battled hard for the lead, and all wore each other out, leaving Win Percy and Allan Grice to take the win in the highly un-fancied Holden Commodore. That was the first Bathurst win for the newly formed Holden Racing Team!