BeCools new premium thermostats for General Motors LS-1 applications feature a patented rubber-coated, V-notch wax-motor valve. This non-linear valve stabilizes engine temperatures quickly and allows faster engine warm ups which prolong engine life as well as improve fuel economy. The uniquely designed valve also reduces overcooling when the thermostat opens and overheating when the thermostat closes, thus reducing thermostat cycling. Additionally, a special air-bleed feature allows for easy cooling system filling when the engine is shut-off. Every BeCool LS-1 thermostat offers longer life and maximum performance thanks to their heavy-gauge stainless steel construction and 24 pound stainless steel spring. Install one today and never lose your cool again.