The Mr. Gasket Ultra-Seal Exhaust Gasket Set are designed to improve the sealing of exhaust header flanges. These premium exhaust gaskets incorporate a graphite-impregnated facing and a steel expanded metal core that reinforce and increase the tensile strength. Gaskets conform to warped flanges and offer increased sealing capabilities without deteriorating or cracking under the excessive heat and pressure that is common in the exhaust system. Sold as a pair.