The 640 hp Ultima GTR has a better power to weight ratio than a Bugatti Veyron, meaning that it's really, really fast. Heffner Performance did what all hot-blooded race-crazed lunatics would: add more power. Heffner claims the twin-turbo GTR managed 1,000 rear wheel hp, and we think that in a 2,500 lb body that sounds amazing and absolutely terrifying.
In order to give people a feint hope of controlling this monster, the Heffner Twin Turbo Ultima GTR is riding on ADV1 wheels and Toyo Proxes R888s.
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