This package was essentially an uprated GS model with added LS badges on each B-pillar, special stripes on the exterior, and LS-only gold anodized wheels (with polished outer face and wheel rim). In May 1980, Mazda introduced a limited production run of special North American models known as the Leathersport Models. The rotary engine had financial advantages to Japanese consumers in that the engine displacement remained below 1,500 cc (1.5 L), a significant determination when paying the Japanese annual road tax this kept the obligation affordable to most buyers while having more power than the traditional engines having a straight cylinder configuration. In Japan, sales were enhanced by the fact that the RX-7 complied with the Japanese Government dimension regulations: thus Japanese buyers were not liable for yearly taxes for driving a larger car. The advantage the RX-7 had was its minimal size and weight, and the compact rotary engine installed behind the front axle helped balance the front and rear weight distribution, which provided a low center of gravity. The transition of the Savanna to a sports car appearance reflected products from other Japanese manufacturers. The lead designer at Mazda was Matasaburo Maeda ( 前田 又三郎, Maeda Matasaburō), whose son, Ikuo, would go on to design the Mazda2 and the RX-7's successor, the RX-8. In Japan, it was introduced in March 1978, replacing the Savanna RX-3, and joined Mazda's only other remaining rotary engine-powered products, called the Cosmo which was a two-door luxury coupé, and the Luce luxury sedan. Mazda's internal project number for what was to become the RX-7 was X605. Series 1 (produced from 1978 until 1980) is commonly referred to as the "SA22C" from the first alphanumeric of the vehicle identification number. More than 800,000 RX-7s were manufactured over its lifetime. It featured a sequentially-turbocharged 13B REW engine. The third-generation RX-7, sometimes referred to as the FD, was offered a 2+2-seater coupé with a limited run of a 2-seater option. This was powered by the 13B rotary engine, offered in naturally aspirated or turbocharged forms. The second-generation RX-7, sometimes referred to as the FC, was offered as a 2-seater coupé with a 2+2 option available in some markets, as well as in a convertible bodystyle. It featured a 12A carbureted rotary engine as well as the option for a 13B rotary engine with electronic fuel injection in later years. The first-generation RX-7, sometimes referred to as the SA (early) and FB (late), is a two-seater 2-door hatchback coupé. The Mazda RX-7 is a front-engine, rear-wheel-drive, rotary engine-powered sports car that was manufactured and marketed by Mazda from 1978 until 2002 across three generations, all of which made use of a compact, lightweight Wankel rotary engine.
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