the nissan gtp zx-turbo (also known as the gtp zx-t) was a series of racing cars developed for nissan motors by electramotive engineering to compete in the imsa gt championship. running from 1985 to 1990, they were known for being the first car to defeat the porsche 962 which had dominated imsa's premiere gtp category. this led to nissan winning the constructor's championship and 12 hours of sebring in 1989 and 1990. during 1990, the gtp zx-turbo were replaced by the newer npt-90.