Thermostat Housing GM LS w/ 1-1/2 - Black

The Thermostat Housing GM LS w/ 1-1/2 - Black is a critical cooling system upgrade for serious LS engine builders and street performance enthusiasts. Whether you're running a stock LS or a heavily modified power plant, the factory thermostat housing often becomes a bottleneck when upgrading fuel injection, ignition timing, or cam profiles. This CVR Performance thermostat housing eliminates that constraint by providing a robust, purpose-built aluminum solution designed to integrate seamlessly into modern LS engine builds while maintaining proper coolant flow and thermal management.

Constructed from high-quality aluminum alloy, this housing features a 1-1/2 inch port diameter that accommodates larger diameter hoses and reduces restriction in the cooling loop—a key consideration when tuning engines for consistent idle quality and startup behavior. The black powdercoat finish provides corrosion resistance and professional appearance that complements modern engine bay aesthetics. CVR Performance's design prioritizes form and function: the casting is optimized for structural integrity under pressure while the compact footprint (5.6 x 2.65 x 8.5 inches) ensures fitment in tight engine compartments without compromising accessibility for service or future modifications.

This thermostat housing is ideal for LS swap installations, crate motor builds, and turbo or supercharger conversions where OEM cooling components fall short. Installation requires standard coolant system draining and basic hand tools; the 0.76 lb weight means minimal impact on engine bay balance. Compatibility spans all GM LS engine variants (LS1, LS2, LS3, LS7, LSX, and generational derivatives), making it a universal upgrade choice for both street and mild competition applications. Pair this with a quality thermostat and quality hose for optimal thermal stability across varied driving conditions.