Turbo charged vehicles are tons of fun. There is nothing like burying your foot in the gas pedal and then feeling the surge of power as your turbocharger kicks in. However, turbochargers are also very sensitive and if they supply too much boost they can cause catastrophic engine failure. With Audi S4 boost controllers you can keep your engine safe by monitoring boost levels from inside the vehicle. Here at Andy's Auto Sport we have a vast selection of Audi S4 boost controllers from all of the top brand names. You can pick the right Audi S4 controller to meet your price and performance needs, and give your car a trick custom look at the same time.

Turbochargers operate by using exhaust gases to spin a turbine that generates increased air pressure in the intake charge. The raised pressure can help your motor develop massive amounts of horsepower but is also extremely hard on internal engine components. Just the smallest amount of excess boost can turn a once mighty engine into a grenade. Your Audi S4 boost controller regulates the boost to the motor by dumping excess air pressure out of a solenoid operated waste gate. Because they are tunable, you can dial up boost when running high-octane gasoline, or dial down boost levels when the weather is hot or when you do not have access to high-octane fuels. This is a must have device for owners of turbocharged vehicles who want reliability and durability from their motors.