Welcome to Granite City Performance
Our primary objective is to offer the finest, proven performance parts to enhance your vehicle to perform above and beyond OEM specifications. We have tools and technical resources available to create a personalized performance package from component to complete; and ultimately, turn-key solutions.
Engine Dyno Simulations
A dyno simulation from Granite City Performance can be a great tool in the development of your next engine. The latest performance parts available can be tested before spending any money or turning a wrench. Engine dyno results have been within 10% of physical dyno tests, the computer can accurately predict how the parts combination will affect your engine before it's built.


