Ford Straight Six (240/300) Thermostat Housing

Black Onyx - 15 Degree

The March Performance Billet Thermostat Housing for Ford 240/300 Straight Six engines combines precision engineering with durable, high-quality materials for a clean, leak-free installation.

CNC-machined in the USA from 6061-T6 billet aluminum, this housing includes an O-ring seal and mounting hardware for a perfect fit every time. The swiveling neck design allows flexible routing and is available in straight, 15°, 45°, and 90° configurations to suit any build.

Compatible with 1.5" radiator hoses, this thermostat housing is available in Polished, Black, Clear Coat, or Black Onyx finishes for a professional appearance that complements any engine bay.

Built to perform and crafted to last — this housing showcases the precision and reliability that define March Performance.

Compatible with OEM and Numerous Aftermarket Thermostats:

• Mr. Gasket High Performance Thermostats 4364
• MotoRad Superstat Thermostats 45358, 45356, 45359
• AC Delco 12514334
• Any other Big Block Ford Compatible Thermostats