Does this go harder than the NSX-R? Meet the Mugen RR — the most hardcore, track-honed, factory-built Honda of all time.. - 240HP K20A with better cams, a titanium exhaust, and a Mugen-tuned ECU. - Lightweight everything: aluminium bonnet, thinner glass, Recaros, and even an aluminium crash beam. - Reworked chassis with Mugen suspension, stiffer dampers, and quicker steering. - Just 300 units built — all sold out instantly in Japan. This wasn’t a dealer optioned package. Mugen built the RR from