Remflex Chev Small Block Exhaust Header Gasket Set Graphite # REM2005Remflex Chev Small Block Exhaust Header Gasket Set Graphite # REM2005 Header Gasket, Graphite, 1. 594 in. x 1. 531 in. Port, 0. 125 in. Thick, Chevy, Small Block, Set Port Style: Square port Gasket Material: Graphite Port Height (in): 1. 594 in. Port Width (in): 1. 531 in. Thickness (in): 0. 125 in. Quantity: Sold as a set. Remflex exhaust header gasket sets feature 100 percent flexible graphite construction that's effective up to 3,000 degrees F, far