In early 1986 the HDT gave the car a dream debut when Brock and new co-driver Allan Moffat won the Nissan Mobil 500 at the Wellington Street Circuit, while team mates Harvey and new team engineer/driver Neal Lowe won the Pukekohe 500 in the second race of the New Zealand series a week later. Of note, the two winning HDT Cars were not brand new SS Group A models, instead they were the teams 1985 Bathurst Commodores, upgraded to 1986 specifications.