The Nissan NPT-90 was a racing car developed in 1990 for Nissan Motors by Nissan Performance Technology Incorporated (NPTI), formerly known as Electramotive Engineering. It was a replacement for the highly successful GTP ZX-Turbo that had won the IMSA GT Championship in 1989. The NPT-90 would go on to win the championship in 1990 and 1991 before being retired by Nissan at the end of the 1992 season. Following five years of development and improvement on the GTP ZX-Turbo, Nissan realized that incoming competition from Toyota and Jaguar meant that a new car was needed to be able to continue to defend their championship. NPTI, Nissan's North American motorsports division, was therefore tasked with construction of an all-new car, abandoning the original Lola-based GTP ZX-Turbo chassis. The new car would abandon the angular look of the previous car, with the cockpit being rounded and narrower. The large intakes at the nose of the car would also be replaced with smaller duct work, while large vertical snorkels for the turbocharger would be placed on the sides of the car. Nissan chose to continue to use the VG30 3.0 litre turbocharged V6 engine that had previously powered the GTP ZX-Turbo, but with improvements to allow for more power output, including the addition of a four-valve head to replace the two-valve design. Eventually, in 1992 Nissan chose to reduce the VG30s displacement to 2.5L in the NPT-91.* So that in case i Retired in 1992 Kinda bad to me