Exhaust Gasket SCH-01531Exhaust GasketSuit SB Chev Spread Port, 1 7 8" Round Port SCH 01531 H 01531 Founded in 1974 by Don Schoenfeld, which it is still a family owned business, Schoenfeld Headers is the world's largest manufacturer of circle track headers, but we specialize in a variety of high quality exhaust parts, including turn downs, extensions, tubing bends and elbows, race mufflers, insert mufflers, mandrel bends, exhaust reducers, header gaskets, and more.