The Werks cars were designed with only one purpose – to win races for Porsche. The light, agile body enabled the 550 to be competitive against the larger V8s of the Italian marques on the track. To aid greater aerodynamics, single screen driver windscreens were fitted and the passenger cockpit side was closed in by a custom made aluminum tonneau cover. This was screwed into the dash area at the front and brackets were fitted above the passenger seat to ensure it was secure at high speed. As many of the ‘customer’ spyders were destined for the track, most were fitted with the tonneau on delivery as opposed to the flimsy canvas roof designed for it.