The ".rar" file you mentioned is likely part of a broader mod collection, such as the Nissan 300ZX GTS Pack or similar community releases.
: Because the twin-turbo V6 (VG30DETT) was seen as too fast for its competition, IMSA eventually banned turbochargers for the class in 1995, forcing Nissan to switch to a V8 engine before eventually retiring the factory team. 1998 Nissan 300ZX IMSA beta for AC 1.16.rar
: These mods usually feature the Nissan 300ZX GTS (IMSA) with its signature wide-body carbon-fiber silhouette and a race-spec twin-turbo V6 capable of up to 800 horsepower . : In 1994, it achieved a historic "Triple
: In 1994, it achieved a historic "Triple Crown" by winning its class at the 24 Hours of Daytona , the 12 Hours of Sebring , and the 24 Hours of Le Mans . : In 1994
The real-world counterpart was so successful that it was effectively "banned" through technical restrictions.