The Nismo 400R was the ultimate evolution of the R33 GT-R — Nismo's attempt to distill their Group A and Le Mans racing experience into a road-going flagship. Named for its 400PS output, it was built around the RB-X GT2 engine with a 2,771cc displacement, wide-body aero package, LM-derived carbon bonnet, and forged LMGT1 wheels. It remains one of the rarest and most coveted Skyline GT-R variants ever produced.

44 units claimed built (though only ~12 are believed to have actually been completed). Base chassis is BCNR33 — no distinct 400R prefix. All conversions done at Nismo Ohmori Factory.