Introducing the 1989 Nissan GTP ZX-Turbo - winner of the IMSA Camel GT Manufacturers Championship. Geoff Brabham reflects on the car and what made it so successful. Available Now on iRacing. One of the most brutally fast racing cars ever built, the Nissan GTP ZX-T was that rarest of beasts: a Porsche and Jaguar killer. Along with the Jaguar (XJR9 and 10), the Porsche 962 (and before that, the Porsche 956) ruled the sports prototype roost in the late 1980s, most especially the IMSA Camel GT Serie