New Remflex exhaust gaskets. This gasket is made from 100% flexible graphite and can withhold temperatures up to 3000 deg F.  These are for exhaust manifold and header applications. 1.53" x 1.59" square ports.  Sold as a pair.  Fits Small Block Chevrolet applications with square port manifolds/headers.  Gaskets are thick and will crush once installed.