Stant Superstat ® Premium Thermostat

Worked great

The is the finest thermostat available at any price. I have tried them all on my 383 small block Chevy engines. The Edelbrock "high flow" was rated at 180. It was made in China and opened at 160 degrees. The Mr Gasket balanced design, also made in China, a copy of the Robert Shaw balanced design. When tested in boiling water, it did not open evenly. It only opened on one side. The Flow Cooler "Robert Shaw" balanced. Country of origin unknown. The design is such that it does not maintain temp consistently and appears somewhat restrictive. The Superstat, made in Israel, is a quality piece, constructed from stainless steel. It is dead nuts accurate. I have the fans kick on at 195 in traffic. The engine will cool down to 178, at which point the thermostat closes. Plenty of flow and stays cool on the highway.

Good product fast shipping

Good fit .....temp of spring right on the gauge .....so I say buy it for the 4.0 jeep

Works as it should. I drilled a small hole on it to help with air bleeding.

my car has not overheated yet

Worked

Fit my 1995 K1500 perfectly and works great. However this is the 180 degree model. My pickup needs a 195 degree thermostat. My own mistake and happily purchasing the correct one I need.