The production version of the Lexus LFA features a V10 engine developed in collaboration with Yamaha exclusive to the car and a body made from carbon fibre-reinforced polymer (CFRP). CFRP materials account for 65 percent of the LFA's body composition by mass. The LFA went into production in late 2010. A circuit-tuned variant debuted in 2012, and was one of the most expensive Japanese road cars ever built. Production ended in December 2012 with 500 cars produced, the final car being a Nürburgring Package model.