This billet aluminum thermostat housing is engineered for GM LS-series engines with a separate thermostat housing and water neck setup. It features a straight outlet designed for 1½″ ID radiator hose connections and is precision-machined from 6061-T6 aluminum. The housing comes with stainless steel mounting hardware and includes a rubber O‑ring seal. Finished in polished billet aluminum, it installs directly on LS-style water pumps and works with factory or aftermarket thermostats.

• Application: GM LS-series engines equipped with separate thermostat housing
• Hose size: 1½″ ID straight outlet
• Material: 6061-T6 billet aluminum
• Finish: Polished
• Hardware: Includes stainless steel mounting fasteners
• Sealing: O‑ring seal included