OEX Throttle Body - Maintain the correct level of fuel economoy and engine smoothness. The Throttle Body is a system which incorporates a butterfly valve which controls the volume / flow or air into the the engine. It is linked to the throttle pedal through either a lever / cable system, or more commonly an electronically controlled mechanism connected via the ECU. When it comes to engine management, OEX have a comprehensive range of quality switches and sensors sourced from world leading manufacturers.