I'll confirm the real thing. It was a version of the MRT5 (w.MRT6 bodywork) that was developed on LFS to test the potential effectiveness of aero devices on the REAL MRT6. In fact, we were using the winged version before anyone else had the MRT5.
Unfortunately the CF wings were never built due to some mold problems, but did manage to build the CF floor/diffuser. We also decided to make the car about 25-30 lbs lighter instead.
If you have any more questions about the MRT5 or MRT6, ask them...