With ProCharger technology, reliably adding big horsepower to your engine is a lot easier than you may think. Intercooled ProCharger systems utilize exclusive features and proven technology to deliver reliable 50-85% emissions legal gains in horsepower and torque with stock motors running pump gas. ATI is the only company that has put stock 4.6 2V's and 5.0's into the 11's, and is the only company that guarantees the best performance gains. Nothing else even comes close!