Throttle body spacers are inexpensive aftermarket accessories for your Jeep Wrangler that are used to increase airflow to the intake manifold. These metallic components are bolted to the back of the throttle body, below the airflow. They are extremely popular with Jeep lovers because they can increase horsepower, torque, and fuel economy, all of which are important for off-roading activities. The part essentially directs more air into the manifold, which increases the amount of o2 that makes it into the intake system and later to the engine. More clean air means that combustion will be faster and more efficient, which should improve fuel economy and performance.