Thermostat Housing LS 15 Degree Clearcoat

The MARCH PERFORMANCE Thermostat Housing LS 15 Degree Clearcoat (BTH-214) is a precision aluminum water neck designed for GM LS-series engines, ideal for performance enthusiasts and engine builders. This 15-degree design allows for optimized coolant flow direction, making it suitable for custom LS engine builds where standard mounting angles may conflict with other components.

Constructed from lightweight aluminum, this thermostat housing reduces unsprung weight compared to traditional cast iron alternatives while maintaining structural integrity under thermal cycling. The clear anodized finish offers corrosion resistance, although performance may vary based on specific environmental conditions. The design includes a 1-1/2-inch ID hose barb for standard coolant hose connections, ensuring optimal flow characteristics.

This thermostat housing is particularly beneficial for those working within tight engine compartment constraints or integrating non-standard radiators. While it includes an O-ring and mounting hardware, users should verify if additional components are necessary for their specific installation needs. The 15-degree angle provides flexibility that factory parts may not accommodate, making it a valuable addition for custom builds.