A Japan-only endeavor, the umbrella organization is called The Prestige Club of GT-R, and to run in it will require a cave-full of yen: the car itself is ¥10,479,000 ($120,725 U.S.); membership in The Prestige Club membership is ¥2 million ($23,024 U.S.) and annual dues are a further ¥1 million ($11,513 U.S.). For all of that you get the special GT-R, a race number and inclusion in two race days and an annual gathering.
As for the racer itself, performance upgrades include new ECM, traction control, ABS and VCD programming, two-way adjustable Bilstein dampers and revised upper front links, a front lip spoiler, NACA duct and brake air guides among other things. Inside, there's a four-point harness with a six-point retention system available over a Bride Gardis III seat, automatic fire suppression system and NISMO data logging kit. The twin-turbo motor puts out in excess of 493 horsepower and 434 pound-feet, and the package rides on 20-inch Rays Forged Aluminum wheels from the SpecM shod with Dunlop Direzza Long Life Slicks. If you're going to be in Japan and want in on the series, applications are being accepted until September 20. Check out GT-R World at the links below for more images and information. Thanks to everyone for the tips!
[Source: GT-R World (translated), GT-R World (translated), NAGTROC]