Thermostat Water Neck Housing Gasket, 1/8" Aluminum Carrier SiliconeThermostat Water Neck Housing Gasket Replacement for Chevy SBC BBC 265 283 305 327 350 383 396 400 427 454 472 500

This thermostat water neck housing gasket is an essential component for maintaining your engine's cooling system integrity. Engineered with a high-quality aluminum carrier and silicone construction, this gasket delivers exceptional heat resistance and durability to withstand the demanding temperature fluctuations of engine coolant. The precision-designed seal creates a tight, reliable connection between the thermostat water neck and housing, effectively preventing coolant leaks that could compromise engine performance. Measuring 4.09 inches by 2.83 inches with a 1.88-inch center aperture and 0.39-inch mounting holes, this gasket offers broad compatibility with Chevy small block and big block engines, including 265, 283, 305, 327, 350, 383, 396, 400, 427, 454, 472, and 500 models. The rust-proof and waterproof design ensures long-lasting performance, while the reusable construction provides excellent value. Installation is straightforward: simply allow the engine to cool, remove the existing hardware, replace the old gasket with this new seal, and reinstall. This replacement gasket helps maintain optimal engine operating temperature and extends engine life by ensuring your cooling system functions as designed. Please verify compatibility with your specific vehicle before ordering.

• 【Premium Durable Construction】 Crafted from a robust 1/8-inch aluminum carrier paired with a high-grade, molded silicone insert. This combination ensures a superior, long-lasting seal that is heat-resistant, waterproof, and completely rust-proof. Designed for reuse, it eliminates the need for messy sealants.
• 【Precision Fitment】 Engineered specifically for Chevy SB and BB engines. Guaranteed compatibility with models including 265, 283, 305, 327, 350, 383, 396, 400, 427, 454, 472, and 500 cubic inch engines. Please verify your specific engine model before purchase.
• 【Reliable Leak Prevention】 Features an innovative design where the silicone seal increases the contact area, creating a firm, leak-proof barrier between the intake manifold and water outlet housing. Effectively prevents coolant leaks to maintain optimal engine temperature and protect engine longevity.
• 【Simple & Quick Installation】 Offers straightforward installation with no complicated steps. Simply cool the engine, remove the old gasket, position this reusable gasket, and re-tighten the housing bolts for a firm, secure seal that matches OEM standards.
• 【Complete Package & Specifications】 You will receive one high-quality thermostat housing gasket. Overall dimensions: 4.09" x 2.83" with a 1.81" center bore and 0.43" side holes. Always verify your vehicle service type and measurements before purchase to guarantee a perfect fit.