1/8 NPT (inc plug & pins) Please take care when wiring this sensor as incorrect wiring will damage this sensor! All MAP and Pressure sensors are individually electronically tested before packaging and are sold "as is" and without any further warranty. Returns of opened sensors are not accepted. If you do not accept these terms and conditions please return the unopened sensor in its original packaging for a full refund. All MAP sensors must not be mounted directly to the inlet manifold, they must be remote mounted and connected via a flexible hose - If required use Pressure Sensor Extension Hose HT-039103