High Quality: This thermostat water neck housing gasket is made of high-quality aluminum and silicone combination, high temperature resistant, able to withstand various temperature changes of coolant, sturdy and durable, not easy to deform or break, good sealing, rust-proof and waterproof, reusable

Practical Function: This thermostat engine coolant water neck gasket replacement has a strong seal and can fit tightly to the thermostat water neck and other connecting parts. It can increase the contact area between the intake manifold and the water outlet housing, effectively preventing coolant leakage, ensuring that the engine maintains the appropriate temperature range, and effectively extending the engine life

Easy to Install: This thermostat water neck housing gasket has no complicated installation operations and is easy to operate. Just let the engine cool down first, then remove the thermostat water neck housing screws, remove the old gasket, replace it with a new gasket, reinstall it and tighten the screws

Wide Compatibility: This thermostat housing seal gasket is compatible with a variety of Chevrolet SB and BB engine models, including 265, 283, 305, 327, 350, 383, 396, 400, 427, 454, 472, 500 engines

Product Information: This thermostat engine coolant water neck gasket replacement contains one piece per listing, with overall dimensions of 4.09 inches x 2.83 inches, a large aperture of 1.81 inches, and small apertures of 0.43 inches on both sides. Please check compatibility and product size specifications before purchasing to ensure compatibility