The Mugen RR (or "Double R") is the ultimate, track-focused evolution of the FD2-generation Civic Type R sedan, representing the pinnacle of naturally aspirated Honda performance. Released in 2007 as a Japan-exclusive limited edition, all 300 units—finished exclusively in Milano Red—famously sold out in just 10 minutes. Mugen engineers put the car on a strict diet, utilizing a carbon-fiber front bumper and grille, an aluminum hood, and specialized Mugen-Recaro bucket seats to shave off 15 kg compared to the standard Type R. The heart of the RR is a hand-touched 2.0-liter K20A engine, fitted with aggressive camshafts, a high-flow exhaust, and a carbon-fiber ram-air intake that boosted output to a screaming 240 hp at 8,000 rpm. With its lowered suspension, Bridgestone Potenza RE070 tires, and upgraded Brembo brakes, the Mugen RR was nearly two seconds faster around the Tsukuba Circuit than the base car, cementing its legacy as one of the greatest front-wheel-drive machines ever built.