Mugen Civic Si N1 Class Racer Parts Catalog 30 January 2014 Administrator Mugen, Racing, Vintage & Nostalgia (0) Here are all the parts you need to build your own Civic Si N1 racer! This awesome brochure is circa 1985. Right-click any image to see the full-size version. Bonus pic: The Mugen Civic Si demo car circa 1986. Mugen Sports exhaust, CF48 wheels, Sports Suspension kit and a set of Yokohama A001R tires. This was and very potent autocrosser and a blast to drive on the street!