Ford 390-428 Thermostat Housing Zero Degree

The Billet Specialties Ford 390-428 Thermostat Housing is a precision-engineered cooling system component designed for classic and performance Ford big-block engines. This product is ideal for mechanics and enthusiasts who demand reliability in high-output applications. It replaces the factory casting with a durable billet aluminum alternative that maintains optimal coolant flow while resisting corrosion and thermal stress.

Machined from solid billet aluminum, this housing addresses the weak points inherent in cast-iron originals, such as stress concentrations and thermal cycling degradation. The design ensures compatibility with factory thermostats while optimizing coolant flow paths. This contributes to better temperature control, which is critical for engines running aggressive tuning or extended track duty.

This thermostat housing is beneficial for carbureted and fuel-injected conversions, street machines, restorations, and race applications where temperature control directly impacts engine longevity and peak output. Weighing just 0.98 lbs, it contributes to overall engine bay weight reduction without sacrificing structural integrity. The compact dimensions ensure fitment with factory manifolds and aftermarket intake configurations on 390 and 428 cubic-inch powerplants.