The German tuning maniacs from SpeedART modified by the 911 convertible. The exact name is Porsche BTR-XL 911 Turbo Cabrio, as BTR-XL is an acronym of “Bi-Turbo Racer – Extra Large”. Maximum power is over 600 cabriolet hp and torque – 800 Nm, thanks to modified VTG turbines and added a sports exhaust system with new manifolds, ending with a black tip mufflers. According SpeedART acceleration BTR-XL from 0 to 100 km / h is about 3.4 seconds and top speed is around 325 km / h with standard transmission. To ensure control over the car at speeds over 300 km / h, engineers SpeedART changed the front bumper, which has better aerodynamics thanks to a special spoiler and larger air intakes for efficient blowing of the radiators. Added and aerodynamic side skirts, rear diffuser, rear spoiler and samoreguliruem carbon side mirrors, painted in red sports.
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