To qualify for SCCA homologation, 500 copies of a car had to be built. It is estimated that Porsche built fewer than 40 GTs with the full race engine. To add to the total, an additional 11 cars were equipped with the Competition Option Group M471 package that included the GT's steel fender flares, rocker panels and nose piece as well as wheel spacers, a set of 6-inch wide Fuchs wheels, and 185/70VR15 tires, but did not include the enhanced engine from the GT. Similar appearance-only kits were also supplied to dealers, totaling about 400 units.