In 2007 Mazda released a Japan-North America limited edition known as the Kuro (Japanese for black). Production run was limited to 500 cars. All cars were finished in Sparkling Black paint, with 18" Monoblock wheels. Kuro version used a more evolved 13B High Power engine, 6 speed manual with a claimed output of 250rwhp @ 9,000 rpm and a 10,000 rpm redline.[citation needed]. Inside this very special edition Mazda featured black coloured leather interior, Bose premium audio system with 6-CD auto-changer, heated seats, electrically operated driver's seat, and climate control air-conditioning, cruise control, traction control, dynamic stability control and eight airbags. This edition has racing-type fully adjustable front & rear Tein suspension, bigger exhaust tips, fog lights, stiffer anti roll bars, better engine cooling system, limited slip differential and a rear spoiler to provide more stability at higher speeds. After Kuro version Mazda announced that this is the absolute Mazda RX-8 version with suggested retail price off 60,000USD($)/6,653,550.00JPY(¥).