The Zonda Monza shown at the 2004 Paris Motor Show is a track-day version of the Zonda built to request for private use. Borrowing its appearance cues from the Zonda GR, the Monza included a dry sump version of the Zonda S 7.3 engine tuned to 600 PS (441 kW; 592 hp) and had improved cooling. Modified aerodynamics, including a different wing and front diffuser, allowed greater speed, as did optimized gearing. The car was lighter, with polycarbonate side windows, and an unmuffled exhaust is fitted. The revised interior includes different pedals, steering wheel, and seats, as well as a reinforced roll cage. Larger brakes and a stiffer suspension also improve performance. Finally, an external fire extinguisher is included for safety.