JET throttle body is a direct bolt on, Hi-Flow replacement for most GM vehicles. The JET Powr-Flo throttle body is a direct replacement for the factory unit. It can be used to replace a worn out throttle body or to upgrade the existing throttle body. JET Powr-Flo throttle body provides increased air flow for improved throttle response by taking advantage of JET’s unique inlet design. JET Powr-Flo throttle bodies include all new pre-installed Calibrated Electronics to allow for a simple “remove and replace” installation.