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Home / Technology / How the 862-HP Subaru WRX STI Gymkhana Car Became the ‘Most Insane’ Ever

How the 862-HP Subaru WRX STI Gymkhana Car Became the ‘Most Insane’ Ever



When the opportunity came for Subaru to take over Gymkhana from Ken Block and Ford with the help of Travis Pastrana, the crew of Vermont Sportscar and Subaru Motorsport began building the most hardcore STI before the ink could dry on the contracts. Subaru had a year to develop the car and set up the massive recording, and then complete the filming in Pastrana’s hometown of Annapolis in just four days. It is a narrow window of any standard, let alone with an 862 horsepower STI pushed to unknown limits.

Gymkhana 11 STI is made of a Subaru WRX STI body from 2020 which has been cut and drilled full of holes for ease. The end result is closer to a tubular silhouette racer, with a flat chassis, full roller cage, and the most complex, ready-to-operate active aerodynamic package that rallycross experts had ever boiled up in the wind tunnel. The body is mostly made of Kevlar and prepreg carbon fiber, while the engine uses the strong, low-stroke crankshaft of the Subaru rallycross car with the larger 2.5-liter block to end up as a 2.3 liter. The icing on the cake is the 3D-printed Inconel exhaust through the hood.

Building a race car without having to follow any rules is every engineer̵

7;s dream, and the longer wheelbase of the WRX STI ensured a better handling machine even with almost 900 horsepower from a flat four. To cope with the wild power and torque, the gearbox got wider gears, while adapted electronics gave Travis Pastrana buttons such as Send It, Shake and Bake.

Apparently, Bake is for flames, bounces and bangs, while Send It optimizes the speed and rear wing for jumps. Despite the furious turbo, the engine was tuned to provide good driveability, something you need when performing stunts on the border.


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