Thermostat Housing LS 90 Degree Black

The Thermostat Housing LS 90 Degree Black from MARCH PERFORMANCE is a precision-engineered water neck assembly designed for GM LS-series engine builds. This component serves as the critical coolant junction point, directing coolant flow from the engine block to the radiator while accommodating the factory thermostat cartridge. Whether you're building a stroker, restomod, or performance LS engine, this 90-degree housing eliminates plumbing conflicts and provides a clean, compact solution for custom cooling systems.

Constructed from lightweight aluminum and finished in durable black anodizing, the Thermostat Housing LS 90 Degree Black features a 1-1/2 inch ID hose barb connection that accepts standard coolant hose for secure, leak-free attachment. The 90-degree orientation allows flexible routing around engine bay obstacles, while the integral O-ring seal and included hardware ensure reliable assembly and proper sealing under pressure. The anodized finish resists corrosion and thermal stress, maintaining structural integrity across extended engine operation and temperature cycling.

This housing is essential for LS engine builders transitioning from OEM cooling systems to custom setups, particularly in engine swaps and fabrication projects where original mounting points don't align. The compact 3-inch cube footprint allows installation in tight engine bay configurations. Compatible with all GM LS-series variants (LS1, LS2, LS3, LS7, and LSx platforms), it integrates seamlessly with aftermarket radiators, water pumps, and cooling lines. Installation requires basic hand tools and standard coolant hose clamps.