Original SCE Pro Copper Embossed Exhaust & Header Gaskets for Ford 390-428FE found in autos. Note: There are three exhaust port heights in Ford FE-FT engines (relative to the upper bolt on the exhaust port). * For proper fitment of this gasket set please Verify Top of Port is .867″ Below Top Bolt Center* Gasket Thickness: .043″ Material: Copper *See embossed copper gasket fitment instructions* SCE introduced the first embossed copper exhaust gaskets in 1995, and they are still the best way to seal a warped or uneven exhaust manifold or header sealing surface. In house design, tooling and manufacture insure superior quality gaskets for the widest array of applications. Whether on your tow vehicle, motor home, hot rod or race car, a properly fitted SCE Pro Copper exhaust gasket will form a permanent trouble free seal.