LT Thermostat Housing 15 Degree Black

The Billet Specialties LT Thermostat Housing 15 Degree Black is a precision-engineered cooling system component designed for LS and LT engine swaps where optimized coolant flow and custom fitment are critical. Built for enthusiasts and professional shops performing modern engine conversions, this billet aluminum housing allows you to dial in the exact thermostat angle required for your specific intake manifold configuration.

The 15-degree offset geometry accommodates restrictive or tightly packaged engine bays while maintaining proper coolant circulation to prevent hot spots and thermal cycling issues. Machined from high-grade billet aluminum and finished in durable black anodize, this housing resists corrosion and maintains a clean, purposeful appearance in the engine compartment. The design reduces stress on hose routing and intake manifold connections compared to stock housings, extending hose life and improving seal integrity under pressure cycling.

This thermostat housing works best in LS/LT engine conversions—particularly in classic muscle cars, hot rods, and modern swap platforms—where OEM cooling passages don't align with custom intake manifolds. Mechanics and builders choosing billet cooling components appreciate the reliability and performance enhancements this product provides, making it an ideal choice for road race and street performance builds.