K&N's Boost Control Module works within factory parameters to increase boost, improving throttle response, and offering a power increase of up to 47 horsepower depending on vehicle application. The system can typically be installed in less than 30 minutes (no software required), and is adjustable on the go, helping you fine tune your boost level to your preferences and needs. When you need more power, simply adjust the dial to give your acceleration a bit of extra muscle. The kit includes the module, wiring harness, adjustable knob, hardware, and full color instructions, and is compatible with other performance upgrades, including exhaust, larger turbos, superchargers, and more. Not legal for sale or use on any pollution controlled motor vehicle in California.