Fits 1959-1980 Chrysler 383-440 Big Block B/RB

Mr. Gasket Performance Exhaust Gaskets are manufactured from high-temperature composite material. They provides maximum torque retention to eliminate gasket failure. Precision die cut for an excellent fit, but can be trimmed if necessary for modified port applications. For OE replacement, high-performance street, drag race and oval track. Rectangular Ports, 1.78 inch x 1.48 inch