The Factory Five Challenge Car, an improved version of the MK4-R, is a front-engine, rear-wheel-drive racer assembled in Wareham, Massachusetts, USA, from 2005 to 2013. This competition-only roadster runs with a powerful 5.0L Ford small block engine delivering 228 PS of horsepower and employs Ford Mustang's EFI controls and transmission. It incorporates several safety features, like a security cage with frame modifications to protect critical parts in case of collision or potential fire, like the racing fuel cell and the driver/co-pilot seats. This custom-made racecar reaches a maximum speed of 165 Mph, going from 0-60 Mph in 5 seconds flat.

The Factory Five Challenge Car is the ultimate racing car because of its outstanding engineering and craftsmanship. It holds a current market value of 21,990 dollars: an excellent choice for aspiring racers who want to get serious in their motorsport adventure. This two-seater is a pure contender with no doors, and no fancy interior features, designed to deliver a raw racing experience at its best. The suspension system is optimized to work like a swiss clock on any racetrack, offering top handling in competition settings. Having one of these at your disposal is a game-changer for track fanatics.