Think of the Honda Civic Mugen Si as a styled version of its standard 4-door counterpart. Featuring Mugen springs/dampers for a stiffer ride, forged aluminum wheels, aero package, a sports exhaust system, and summer tires. Video and more pictures after the break.

Powered by a Mugen-tuned 240hp engine, the Mugen Civic RR takes on its big brother (in the UK), the S2000 GT for an incredible Honda showdown. Both vehicles are similar in price ($38,000 - $40,000), but will one outshine the other? Fifth Gear sets to find out. Hit the jump for the video.

Who can resist an open-top S2000 concept? Apparently, not Japan-based, Honda tuner Mugen. It's outfitted with carbon fiber accents on the interior, Mugen bucket seats, and a host of exterior parts. Hit the jump for one more picture. No word on engine tuning or other stats to suggest it's not just a styling exercise. Still, we're okay with stock in this case.