The Bugatti EB110 Supersport chassis SS05, called S5, is the third Supersport prototype built by the factory, after the cosmetic GT008 and the S4. For the first time, the car has inaugurated the rear side plate with five holes and an engine air intake, but S5 still does not have all specific appendages of the Supersport. Interestingly, the S5 is the first Supersport prototype with the final Supersport chassis number numerotation.