1-7/16 inch width x 1-3/8 inch height RAISED D-Shaped Port; Chevy V8 - 4.3L -LT1 ('94-'96), 5.7L-LT1 ('92-'97), LT4 ('96), Raised D Port, For Headers, 2/Set;Use for Fast Burn Heads and ZZ4 Crate Motor;Port configuration comparable to Fel-Pro 1470;Heating and cooling of the exhaust system causes header and manifold flanges to warp resulting in gaps between the head and header which Remflex exhaust gaskets seal completely due to the thickness and compressibility of the 100 percent flexible graphite;There are no rubber binders or composite materials in Remflex exhaust gaskets so they will not shrink or harden due to time or temperature eliminating the need to go back and continually retighten your flange bolts

• Remflex 2022 Exhaust Gasket for Chevy V8 Engine, (Set of 2)

Remflex 2022 Exhaust Gasket for Chevy V8 Engine, (Set of 2)Remflex