Superior STL010 SureCool Thermostat Bypass for 14+ 6L80e/6L90e and 16+ 8L90e Transmissions

Superior STL010 SureCool Thermostat Bypass for 2014+ 6L80e/6L90e and 2016+ 8L90e Transmissions This kit allows you to bypass the OEM 194 degree thermostat in the factory 2014+ 6L80e and 6L90e & 2016+ 8L90e transmission cooler line assembly. If you're installing an aftermarket cooler on your 14+ application, this is a must-have part! But, it even provides a cooling benefit with the OEM cooler. Allows you to re-use the existing GM block w/ lines and units listed in TSB Bulletin No. 21-NA-199. Built in safety bypass • Immediate cooler fill. • Immediate accurate fluid level check without warm-up cycle • Reduced average operating temperatures by as much as 30% • Reduced risk of overheat while under load, Increased ATF life.