Header Gasket Set - SBC D-Port 1.500 x 1.675

The Header Gasket Set - SBC D-Port 1.500 x 1.675 is an essential sealing component for small-block Chevrolet engines equipped with D-port cylinder heads. This gasket set seals the critical interface between your headers and cylinder head ports, preventing exhaust leaks that can degrade engine performance and create unwanted noise. Whether you're rebuilding a classic muscle car, upgrading a hot rod, or refreshing an aging engine, a proper header gasket set is non-negotiable for reliable, leak-free operation.

Manufactured by MAHLE ORIGINAL/CLEVITE under part number MS19985, this gasket set is engineered to withstand the thermal cycling and exhaust gas pressures inherent to high-performance SBC engines. The 1.500 x 1.675 inch port dimensions are precisely matched to D-port head castings, ensuring a flush seal without overhang or gaps that would compromise exhaust scavenging. MAHLE's reputation in OEM and performance gasket manufacturing guarantees material composition and thickness that resist blow-out, even under sustained high-RPM operation or turbo/supercharger applications where exhaust temperatures spike dramatically.

Mechanics and engine builders favor this gasket set for any SBC application running D-port heads—from mild street engines to fully built competition motors. Installation is straightforward: position the gasket over each header port during assembly, ensuring proper alignment before torquing header bolts in a star pattern to manufacturer specifications. The lightweight, compact packaging (0.43 lbs, 6.2 x 0.5 x 24.1 inches) makes storage and handling convenient, and having a quality gasket set on hand is insurance against costly mid-build delays or mid-season failures.