two primary types of LS thermostat adapter plates: those for converting the coolant hose connection style and those for replacing the entire water pump for a remote electric pump setup. Some adapter plates are also specifically designed to address compatibility issues when swapping an LS engine into a different chassis.Â
Coolant hose adapter plates
These adapters replace the factory “push-on” thermostat housing with one that uses a threaded, performance-style AN fitting or a different size barb fitting. This is often necessary when upgrading to braided coolant hoses.Â