Have completed the interior of the Fujimi R31 GTS-R. I am quite certain the interior tub and roll-cage are not for an R31. The dash looks about correct, but does not fit the interior tub and the roll-cage needs to be trimmed to fit to the top of the dash. The seat also feels something of a Fujimi 'parts bin' item. Do not have the motivation for up-specc'ing the interior or adding seat belts to this kit.