USRT's billet aluminum 16v coolant neck piece allows you to mount a factory temperature sensor and also the a GM sensor at the same time! Most standalone ECUs offer direct support for these super-common, inexpensive, and reliable bits. Use the VW part to handle the fans, etc. Sensors are not included.
Note: Run sensors facing right side up or upside down.
Kit Contents: Billet aluminum coolant neck (3/8 NPT + M10), O-ring gasket, 3/8 NPT plug