Review on 🚀 Jet Performance 10183 High-Performance Thermostat by Gilbert Pfaff

I've used nozzle thermostats on a variety of cars of different names and models over the last 15 years but the quality has dropped a lot lately. I ordered this exact one for my 2006 Grand Cherokee 5.7 Hemi to replace a working stick thermostat. The stock thermostat typically ran around 205-210°F. The jet was advertised and marked as 180°F, after it was installed and warmed up my jeep ran significantly hotter at 217-225°F, which is a faulty product (which sometimes happens) and I had previous experience with jet products which worked amazing. So I ordered a second thermostat from Jet as well as a Mishimoto 180* thermostat, this time I tested both before installing by placing a digital cooking thermometer in a pot of water and bringing it up to temperature. Mishimoto opened at the specified temperature, but the second jet thermostat did not open until 205*. Both jet thermostats were returned and Mishimoto installed. This could be a faulty batch, a design flaw in this model, or a deterioration in build quality affecting performance.* Temperature measured using Pioneer W4400NEX with iDatalink Maestro with OBDII connector and readings on screen.