The Tipo 539/61 chassis was similar to the regular SWB unit, but featured revised rear suspension pickup points. Furthermore, it had smaller diameter tubing and extra bracing points for rigidity. This lighter chassis supported a body which was made of exceptionally thin 1.1mm aluminum. As the most evolved version of the SWB, this body features wider wheel arches, a flat trailing edge on the side windows and occasionally a fuel protection flap over the driver’s side exhaust. To learn more, check out the in-depth Ferrari 250 GT SWB ‘SEFAC Hot Rod’ article.