Modified GM coolant temp sensor for Air-Cooled VW use. The Type 4 sensor has a larger hole so it can be mounted to the factory location with a 10mm x 1mm bolt or you can use an intake manifold stud if you wish.
This is not meant to act as or replace a proper cylinder head temp sensor
Uses standard GM calibration tables. Here is info for 3 point reference:
7000ohm - 48°F
1930ohm - 87°F
560ohm - 146°F