High-Flow ThermostatPre-LT1 GM, Ford, AMC1979-2003 Chrysler, Dodge 318, 360 & 5.2L, 5.9L180 degreesCopper Case & Wax CompoundStainless Steel Triple-Bridge Fits GM, Ford, AMC, and Mopar 318, 360 & 5.2l, 5.9l v-8 enginesAccurately meters coolant flow to maintain desired engine temperaturePrevents decreased fuel efficiency, loss of power, and increased wear & tearUtilizes a larger opening than OEM thermostats which increases coolant flow up to 50Manufactured with a copper case and wax compound to ensure rapid response to changes in coolant temperatureInterchangeable with:Stant 45358Stant 65358Gates 33008S