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2011-2012 Shelby GT500 Supercharger Pulleys

JMS is the industry-leader in upgrading 2011-2012 Shelby GT500 Mustang superchargers, and we build some of the most powerful modified versions of these cars in the world.  Over the years we've learned a lot about how to maximize the power hidden inside the factory blower.  We've also learned a lot about taking GT500 builds to the next level, and stratospheric levels of horsepower and torque.


The stock 2011-2012 Shelby GT500 is already a brute with over 550 HP, and capable of much more with just some basic twisting of the screw.  The most common first upgrade for the Shelby GT500 is a new and smaller supercharger pulley, and we offer a wide range of options along with other accessory type pulleys to aid in performance increases.  We also manufacture some of our own components, which means we usually always have them on hand.


JMS also supports your pulley upgrades with pre-engineered custom tune files just for the 2011-2012 Shelby GT500 so when you're ready for more boost, we can provide a complete turn-key solution with the right hardware and the reliable tuning you can count on every day.

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