Header Gasket Set - SBC D-Port 1.750 x 1.600

The Header Gasket Set - SBC D-Port 1.750 x 1.600 is a precision-engineered exhaust header gasket pair designed for Small Block Chevy engines requiring reliable high-temperature sealing at the cylinder head-to-manifold interface. Built by MAHLE ORIGINAL/CLEVITE, a trusted OEM supplier with decades of gasket manufacturing expertise, this set addresses a critical seal point in any classic or modern small block Chevy build. D-port geometry matches the exhaust port configuration of most SBC heads, ensuring proper alignment and consistent clamping load across both cylinders.

Each gasket features a steel core graphite construction, a proven composite that combines rigid support with flexible sealing properties to accommodate thermal cycling and vibration without degradation. The 1.750 x 1.600 inch port dimensions correspond to standard SBC exhaust port openings, maximizing seal surface contact and minimizing blow-by at the gasket perimeter. Graphite facing material resists oxidation and maintains gasket integrity across repeated heat cycles, whether under street or performance engine conditions. The steel carrier prevents extrusion and provides structural stability during header installation and engine operation.

This pair gasket set is ideal for engine builders, restorers, and performance enthusiasts assembling or rebuilding any small block Chevy variant—265, 283, 302, 327, 350, 400, or similar displacement engines using standard D-port head castings. Installation requires only standard header bolts and basic gasket surface preparation; no specialized tools or techniques are needed. Proper torque sequencing and a clean seating surface ensure longevity and eliminate exhaust leaks that can otherwise compromise engine efficiency and create audible manifold leaks during idle or acceleration.