in 1991, he went stateside to the imsa championship and drove for nissan performance technology inc. [npti] at the sebring 12 hours along his other brother geoff and irishman derek daly. starting from pole, they won the race in their nissan npt-90. this victory did not open any more doors. brabham settled for a series of one-off drives: a drive in an older nissan at miami, an outing in a stürtz-bmw sm in an interserie race at brands hatch and another visit to the bathurst 1000.