Water Neck Outlet w/180 Degree Thermostat GM LS

The Water Neck Outlet with 180 Degree Thermostat for GM LS-series engines is a direct replacement component designed to manage coolant flow and engine temperature regulation in modern performance and stock LS applications. Manufactured from aluminum for lightweight durability, this assembly integrates a 180-degree thermostat that opens at a lower temperature threshold than factory OEM thermostats, promoting faster warm-up cycles and improved thermal efficiency during extended engine operation.

The 1-1/2 inch ID hose connection accommodates standard coolant line diameters found on LS-series blocks, ensuring proper fitment across LS1, LS2, LS3, and similar engine variants. The 180-degree thermostat specification is critical for engine builders and enthusiasts seeking to lower coolant temperatures under sustained load—particularly beneficial during track days, high-output tuning, or in hot climates where OEM thermostat temperatures (typically 195–210 degrees) can compromise cooling capacity. The natural aluminum finish resists corrosion in typical engine bay environments while maintaining a clean, professional appearance in visible engine compartments.

This replacement is ideal for engine rebuilds, cooling system upgrades, or warranty-covered thermostat replacement on LS-equipped vehicles. Whether restoring a factory LS power plant or optimizing a modified engine's thermal management, a quality water neck outlet with properly rated thermostat is essential for long-term reliability and consistent performance. PRW Industries manufactures OEM-quality and performance cooling components trusted across the LS engine aftermarket.

Each unit is a complete assembly ready for installation, with the thermostat and water neck integrated for simplified replacement during routine maintenance or performance upgrades.