Remflex Exhaust Header Gasket CADILLAC V8, 365, 390, 429 # REM14-002Remflex Exhaust Header Gasket CADILLAC V8, 365, 390, 429 # REM14 002 Exhaust Gasket CADILLAC V8, 365, 390, 429 ('56 '67), 3 Port One Piece Gasket, For Header Applications, 2 Set Port Style: Square port Gasket Material: Graphite Thickness (in.): 0. 125 in. Quantity: Sold as a pair. Notes: For use with headers only. Remflex Exhaust Header Gasket Sets Remflex exhaust header gasket sets feature 100 percent flexible graphite construction that's effective