Name Koso Temperature Sensor with adapter d=26mm Item No. KO-BG026B00 Brand Koso
The T-shaped adapter is placed between the radiator hose. It comes with a temperature sensor and clamps. No need to buy a new thermometer if the sensor does not fit your cylinder head thread.
Note: please measure the inside diameter of the radiator hose before ordering! This version has a 26mm diameter.