An internal combustion engine has some definite similarities to a human being. It must have air to "live" It is the job of the Roush throttle body that helps to supply the air to the engine so that it does not choke. You can think of it as the throat that the air must pass through each time that you step on the gas pedal. As the air enters into the system, it first travels through the air filter, and then through the throttle body. This part is bolted to the stock intake manifold. This high performance Roush throttle body can definitely improve you air flow which in turn improves the amount of power that you have. It comes with the idle bypass valve and the throttle position sensor. When you decide to install this high performance automotive component, installation is easily accomplished since any necessary hardware comes with the part. Since it is made by Roush, you know that it is quality. Roush has been earning a reputation for creating only quality parts ever since 1995. With this kind of a reputation, you know that a Roush throttle body will not let you down. Auto hobbyists definitely deserve high quality support and help while looking at good quality auto parts. For our valued customers, we make available a 24-hour, 7 day a week technical support call bureau to assist you with your calls. Nobody likes to pay for shipping, so we offer FREE shipping for each order $50 or higher. If you spot a lower price elsewhere, let us know - we will meet or beat any advertised price for auto parts.