McLaren will create a hardcore, track-only version of the Senna. As these spy shots show, the meaner model wears a far more aggressive body that includes new fender vents and a revised rear wing. Power comes from a tweaked version of the 4.0-liter twin-turbo V8 making 813 horsepower (606 kilowatts), rather than 789 hp (588 kW) in standard form.

McLaren Senna GTR Spied For The Very First Time