SLP offers this 160º thermostat for all LS1/LS2/LS3/LS6/LS7 2004-08 Corvettes/2005-06 GTO/2004-06 (2007 Classic) Full Size Trucks/SUV's equipped with 4.8/5.3L/ 6.0L engines along with 2006 Trailblazer SS and 2008 Pontiac G8. These low-temp thermostats dramatically reduce operating temperatures, while increasing thermal efficiency and your engine's performance in the process. Racers know that a cooler running engine is a better performing engine. This new thermostat replaces the factory unit, allowing coolant to circulate at lower engine temperatures, keeping the engine cooler. Not legal for use on pollution controlled vehicles.