custom. in US they do make custom gearboxes for those who wanna have urm. (even for longitunal mounted). 80% serious dragters have custom gearbox.
I think the picture suggest that the owner wanted to check filament issues. There is a guy in UK (MR-S owner) who actually bought a rear half MRS* & using a 3SGTE for MR2 MK2 just to check filament issues before embarking on his quest to emulate the GT300 cars.
*(link was posted in the zth "mrs-spyder thread)