Chevy V8 Thermostat Housing - Straight

The Edelbrock Chevy V8 Thermostat Housing - Straight (MPN 4816) is a premium water neck replacement engineered for small-block and big-block Chevrolet V8 engines. This component serves as the critical junction between your engine's cooling system and radiator hose, directing coolant flow with precision while maintaining structural integrity under thermal stress. Whether you're rebuilding a classic Chevy motor, upgrading an existing cooling system, or restoring a high-performance engine, this straight-port design eliminates restrictive factory geometry and improves coolant circulation efficiency—essential when running tighter cooling tolerances or aftermarket radiators.

Constructed from durable aluminum and finished in polished form, the Chevy V8 Thermostat Housing - Straight features a 1-1/2 inch inside diameter hose port and integrates an O-ring seal for leak-free operation without requiring traditional gaskets or sealant. The straight configuration—as opposed to angled designs—reduces turbulence and pressure loss in the cooling loop, allowing the thermostat to regulate engine temperature more responsively. Edelbrock's polished aluminum construction resists corrosion while maintaining a clean aesthetic under the hood, and the included stainless hardware ensures long-term reliability without seizing or rust concerns, even in demanding storage or coastal environments.

This water neck is ideal for engine builders, hot rod enthusiasts, and mechanics restoring or upgrading both carbureted and fuel-injected Chevy V8 platforms. Installation is straightforward—remove the factory housing, install the new unit with the O-ring seal, torque the stainless bolts to specification, and reconnect your upper radiator hose to the 1-1/2 inch ID port. The compact footprint (5.45 x 2.3 x 5.8 inches) ensures compatibility with tight engine bay configurations, and its lightweight design (0.55 lbs) won't strain mounting points or add unwanted mass. Edelbrock's reputation for precision manufacturing makes this an excellent choice for anyone seeking reliable cooling system performance without compromise.