Characteristics. 1 - 14" Width x 2 - 332 in. Height Oval Port; Ford V8 - 429 - 68 - 73 - 460 68 - 87 - Except Cobra Jet Oval Port for Carbureted Engines 2Set. Not for Fuel Injected Engines. Manifold or headers.Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in deficiencies between the header and header which remflex exhaust gaskets fully seal due to the thickness and compressibility of the 100% flexible graphite.No composite materials Rubber ring binders or remflex exhaust gaskets so they do not shrink or harden due to time or temperature eliminates the need to continually retighten your flange bolts