Fits Sonny's 5.00 Inch Bore Center Pontiac Heads - Set of 2 Pieces

Mr. Gasket's Ultra-Seal III is a premium composite material. Its high density, multi-polymer material developed for steam, oil, and chemical resistance in high performance and industrial applications. Perfect for sealing with low flange load, has high crush resistance, exceptional torque retention properties and unrivaled resistance to blowout. For applications with intermittent operating temperatures up to 650 degrees Fahrenheit.