These Direct-to-Head Sigma 38mm Throttle Bodies are a single unit throttle body conversion kit significantly improving the airflow into the engine. These throttle bodies feature oval, 'shaftless' and knife-edged butterflies for improved airflow & performance and with the throttle blade very close to the inlet valve the engine response is significantly improved and offers superior idle control over other individual throttle bodies. The Sigma Engine is often named as Zetec-SE or latterly Duratec and can be found in Ford Fiestas, Pumas and Focus'.
Delivered fully assembled, with a Billet Aluminium Fuel Rail, choice of Linkage Options, Choice of Inlet Lengths and calibrated for your choice of TPS. The OEM injectors, Throttle Position Sensor (TPS) and Throttle Cable are Compatible with this kit. Engine management is the only additional part required to achieve significant power gains.