Aluminum housings corrode where the gasket sits and then never seal again no matter how much sealer goes on. This is a faithful reproduction in high grade cast aluminum with the GM casting number as original on 1969 and later applications, and it comes with the gasket so it goes on once.

Auto Metal Direct W-544 Thermostat Housing Features:

• Fits 1966-1973 Chevy Chevy II and Nova.
• Fits 1966-1972 Chevy Chevelle and El Camino, and 1967-1969 Camaro.
• Faithful reproduction in high grade cast aluminum.
• Includes the cast GM part number as original for 1969 and later applications.
• Note that pre-1969 applications had the casting number in a different location.
• Gasket included. Officially Licensed GM Restoration Part.