Ultra-Seal Header Gaskets Fits 1970-1979 AMC 304, 360, 390, 401. Dogleg Ports, 1.25 Inch x 1.75 Inch Mr Gasket

The Mr. Gasket Ultra Seal is an exhaust gasket set designed for specific AMC V8 engines from 1970-1979, including 304, 360, 390, and 401 cubic inch displacements. It features a steel core with a graphite facing for enhanced heat resistance and sealing capabilities.
The gasket's expanded steel core provides stability and helps maintain torque retention, while the graphite facing transfers heat away from the cylinder head. This material conforms to minor surface irregularities, ensuring a reliable seal even if the flange loses clamp load. The Ultra Seal design can also be trimmed for modified port applications, making it suitable for original equipment replacement, high-performance street use, drag racing, and oval track applications.