Hennessey aren’t lying when they call their performance upgrade for the Nissan GT-R a Godzilla. The Godzilla 700 upgrade is indeed huge, and packed with 700 hp of power. Hennessey worked on the 2009 GT-R, upgraded the induction and exhaust systems, threw in a couple of turbochargers, upgraded the boost controller, and added new intercoolers.
All these changes lead to a massive power output of 700 hp, with the torque rating at 630 lb-ft. The power output is way above the 475 hp the stock GT-R produces. If that power is too much to handle, you could also opt for the Godzilla 600, a 600hp, 570 lb-ft package. The Godzilla 700 package comes for $18,500 ($24,500 including installation), and the 600 costs $11,500 ($14,500 installed).