Take control over your engine coolant temps by changing to a lower temp thermostat. These thermostats open at a lower temperature than your stock thermostat, getting your hot coolant to the radiator sooner. This is an important modification to make on any engine making more power than stock, from a cam only setup all the way into supercharged build. 

• Suits VY Series II LS1 & VZ LS1 and non integrated thermostat design (aftermarket housings)
• Opening Temp: 71°C (160F)
• Flange Dia: 54mm (2.126")
• Foot Dia: 37mm (1.457")
• Height: 47mm (1.850")
• Bypass style thermostat with inverse jiggle pin.
• Thermostat gasket included.
• Thermostat gasket not sold separately.
• Alternate temperature - OE. 86°C (186.8F)

Alternate to Tridon TT456-160