Rubuta ci gaba don wannan sakin layi - A cikin 2003 GRM ya gina mota ta biyu don shahararren direba mai motar yawon shakatawa Peter Brock wanda zai fara fitowa a zagaye na 2 na gasar a Symmons Plains a Tasmania. Brock ya tuka Monaro mai cin nasara a Bathurst a gasar cin kofin kasashe a gasar Grand Prix ta Ostiraliya ta 2003
a Melbourne kafin a fara gasar a 'yan makonni daga baya a Adelaide. A Melbourne motar ta yi gudu tare da sanannen Brock # 05 maimakon # 427 na yau da kullun, inda ya ci nasara a cikin tsere huɗu bayan ya yi yaƙi da Lamborghini Diablo na Paul Stokell, kodayake Brock ya yarda cewa ba zai ci nasara da ɗayan waɗannan tseren ba idan Stokell bai sami matsala a kowace tsere ba. Daga nan sai ya tuka sabuwar motar, wanda aka fentin ja kuma, har zuwa ƙarshen jerin, ba tare da ƙungiyar Monaro ta tallafawa Just Car Insurance ba (babban mai tallafawa na GRM a cikin V8 Supercars shine Valvoline), a cikin Gasar Kofin Nations tare da Pretty, kodayake bai ci nasara ba gasar cin kofin Nations zagaye ko tsere har zuwa tseren buɗewa na zagaye na ƙarshe a Surfers Paradise. Pretty da Brock sun gama na uku da na huɗu a gasar zakarun Turai ta 2003.