SKU: BSP90119
UPC: 800770109855
MPN: 90119
The Billet Specialties Thermostat Housing -20AN Straight Up Chevy is a premium cooling system component designed for serious engine builders and street performance enthusiasts who demand reliability and aesthetics in their builds. This aluminum billet housing replaces the factory plastic unit and serves as the central hub where your coolant lines converge before entering the engine block.
Crafted from solid billet aluminum, this housing features a straight-up orientation that accommodates -20AN (AN20) hose fittings, allowing you to run custom coolant lines with precision hose ends instead of relying on crimped rubber hoses and factory clamps. The billet construction provides superior durability compared to factory plastic housings, which are prone to cracking under thermal cycling and pressure spikes common in modified engines.
This housing is ideal for Chevrolet small block and big block engines being upgraded with modern cooling systems, fuel injection conversions, or high-performance builds where stock components don't meet your reliability needs. The -20AN port sizing matches professional-grade cooling systems, giving you the flexibility to design a custom coolant circuit that optimizes flow and heat rejection for your specific engine platform and radiator configuration.
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