Call it the TR40, TT40, GTT40, GTR-40, TS-R 40 etc..
Make it a high boost (~10-14 psi) twin turbo application, larger intercooler, lower compression (~8.0) and blue printed engine, cams, more boost, 6 speed transmission, monster brakes, 18" wheels, t-series kit, sat nav, tv etc.. Make it produce oh, around 300 Kw.
Forget the XU-6.. R34 GT-R is where this should be headed against. With a long delay in japan for the R35 GTR V6 twin turbo, you could sell them there. It could be targeted as more of a M3, Porka, GTR, competitor.