Mugen, Japanese tuner of all things Honda, has crafted a special edition version of Honda’s fun-to-drive S660 roadster with mild cosmetic and chassis revisions.

Aesthetically, the Mugen S660 RA is less aggressive than a standard model fitted with the firm’s standalone parts, as the tuner limited exterior upgrades to a carbon-fiber grille, brand badges, a twin-pipe sports exhaust and new BBS alloy wheels measuring 15-inches with 165/55R15 tires at the front and 16-inches with 195/45R16 at the back.

Inside, the roadster gets new leather steering and gear lever wraps with contrast stitching, carbon fiber trimmings, different Start button and digital display on the instrument panel, plus a serial number plate.

A re-tuned suspension with Bilstein shocks is also part of the package to improve handling.

While Mugen is known for its power upgrades too, the Honda tuner’s hands were tied with the S660 since it belongs to Japan’s special Kei Car class that limits engine displacement to 660cc (0.66 liters) with an output of no more than 64PS (63hp). With its factory turbocharged 0.66 liter three-cylinder lump producing 64PS (63hp) at 6,000rpm and 104Nm (76.7 lb-ft) of peak torque at 2,600, the S660 was already maxed out.

Some call Honda’s diminutive S660 the retired S2000’s modern-day little brother, but we’ll never have the chance to find that out for ourselves, since the Mugen S660 RA’s production will fittingly be limited to 660 units exclusively for Japan where it will go on sale on October 3 priced at 2,890,000 yen (equal to $26,300 or €23,500).

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