Exhaust Gaskets, Header, Ultra-Seal, Steel Core Laminate, Dart/Buick Head, Chevy, Small Block, Pair1957-1999 CHEVY SMALL BLOCK 1957-1999 Chevrolet 283, 302, 305, 350, 400 1957-1999 Chevrolet 283, 302, 305, 350, 400 1957-1999 Chevrolet 283, 302, 305, 350, 400These premium exhaust gaskets from Mr. Gasket are designed and constructed to improve the sealing of exhaust header flanges. Unlike standard exhaust gasket material, Ultra-Seal exhaust gaskets incorporate a graphite-impregnated facing and a steel-expanded metal core that reinforce and increase the tensile strength. This allows the gaskets to conform to warped flanges, giving them better sealing capabilities without deteriorating or cracking under the excessive heat and pressure that is common in the exhaust system.". Gasket Material Steel core laminate Notes Fits Buick style Dart heads. Port Height (in) 1.350 in. Port Style Stock Port Width (in) 1.520 in. Quantity Sold as a pair.I AM A PARTS STORE THATS BEEN IN BUSINESS FOR 60 YEARS!!!!!!!! GOING TO HAVE A LOT MORE TO ADD IN THE NEXT FEW WEEKS, IF YOU HAVE ANY QUESTIONS EMAIL ME ILL GET BACK TO YOU ASAP.MADE IN THE USA THANKS FOR LOOKING !!!!!!!!!!!! HAPPY offerDING !!!!!!!!!!!!

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