What Nearly Happened in the 90's -- the Mugen NSX Supercar 17 March 2014 Administrator Mugen (0) In early 90's Mugen was keenly interested becoming a stand alone sports car manufacturer. Mugen's vision was akin to what Ruf did with Porsche, Alpina with BMW and AMG was doing with Mercedes Benz in that era... Several prototypes using the NSX chassis were built and tested. Here is a never-before-seen spec sheets for their proposed super car - the Mugen NSX!