The Saleen S7 Twin Turbo is an updated revision of the original S7.
Although the initial concept for the S7 incorporated twin-turbochargers,
they were not used on the production car. The twin-turbocharged version
later developed in 2005 went on sale for $585,296 USD, replacing
standard S7 production.
The engine was upgraded with two Garrett turbochargers producing
approximately 6 psi (0.4 bar) of boost, increasing the maximum power to
750 horsepower (760 PS/559 kW) at 6300 rpm, and the maximum torque to
700 lb·ft (949 N•m) at 4800 rpm. The front and rear diffusers and the
rear spoiler were also reworked to increase downforce by 60%.