Thermostat Housing LS 45 Degree Clearcoat

The MARCH PERFORMANCE Thermostat Housing LS 45 Degree Clearcoat (BTH-213) is a precision cooling system component engineered specifically for GM LS-series engines. This aluminum water neck features a 45-degree inlet angle with a 1-1/2-inch ID hose barb, providing optimized coolant flow dynamics while maintaining structural integrity under high-temperature operation. Clear anodized finish delivers both corrosion resistance and visibility for coolant condition monitoring without sacrificing durability in harsh engine bay environments.

Aluminum construction keeps weight to a minimum at 0.44 lbs while the anodized finish prevents oxidation and galvanic corrosion common in traditional bare aluminum housings. The 45-degree inlet angle reduces restriction and turbulence compared to straight configurations, promoting efficient thermal management across the entire cooling circuit. Complete with O-ring seals and all required hardware, this thermostat housing integrates directly into factory or custom cooling systems without modification. The hose barb connection is compatible with standard coolant hose sizes and eliminates the need for proprietary adapters.

This component suits both street performance builds and high-output engine swaps where reliable thermal regulation is critical. Engine builders and restoration shops value MARCH PERFORMANCE parts for their precision manufacturing and direct fit compatibility with LS applications. Whether upgrading a factory cooling system or designing a custom circuit, this thermostat housing delivers the port configuration and material quality expected in serious engine work.

LS-series engines dominate hot rod, truck, and performance applications across multiple platforms. Clear anodized aluminum housings have become the preferred standard in that segment, offering superior corrosion resistance compared to cast iron while maintaining the visual appeal demanded by modern enthusiasts. The 45-degree configuration and 1-1/2-inch hose barb are common specifications in aftermarket LS cooling systems, making this part a direct replacement for OEM or worn housings.