Most Infiniti coupes, sedans and crossovers are based on the Nissan FM platform. Total production of the E46 M3 was 56,133 coupes and 29,633 convertibles. Of those, were 12 Pontiac Solstice Coupes and 8 Pontiac Solstice roadsters. A total of 243,114 Impala SS coupes and convertibles were built for 1965. Wheelbases were reduced to from for coupes and sedans and for wagons. A larger fuel tank was standard equipment in sedans and coupes. A total of 1,000 GS Corvettes were produced, 810 coupes and 190 convertibles. The new styling increased the trunk capacity of both coupes and sedans to . A total of 1,918 coupes and 484 convertibles were built. A total of 1,000 GS Corvettes were produced, 810 as coupes and 190 as convertibles. Sales increased to 969 coupes and 248 convertibles. Total sales included 522 coupes and 125 convertibles. Final production numbers show 784 Coupes and 151 Convertibles were built; 935 total. The Sports Roof was continued for all hardtop coupes. Sales were good until the 1990s, when large 2-door coupes became unpopular.