Upgraded aluminum engine coolant thermostat housing. More resistant to high temperature and pressure than the original plastic housing, reducing 99% of damage caused by high temperature and pressure cracking and plastic aging. High-quality materials and excellent design, better heat dissipation and cooling effect, ensuring the engine runs at the optimal temperature. We have the most advanced laboratory equipment for testing, and the product quality can completely replace OE parts. This engine thermostat can directly replace the original thermostat, match the original engine thermostat, and its work and appearance are the same as the original engine coolant thermostat.