Header Gasket Set - SBM Ret-Port 1.800 x 1.750

The Header Gasket Set - SBM Ret-Port 1.800 x 1.750 from MAHLE ORIGINAL is an essential component for builders and mechanics performing header installation or replacement on small-block modified engines. Custom headers unlock horsepower by optimizing exhaust scavenging, but a proper seal between the header flange and cylinder head is critical—any leak will kill performance gains and allow hot gases to escape prematurely.

This OEM-quality gasket set ensures a dependable, long-lasting seal under the extreme heat and pressure cycling that high-rpm modified engines demand. Engineered by MAHLE ORIGINAL, a trusted name in OEM gasket manufacturing, this header gasket set features SBM (small-block modified) specifications sized for 1.800 x 1.750 inch runner ports—the standard dimensions found on many stroker and performance small-block builds. The retraced-port design accommodates headers with precision-ported cylinder heads, ensuring full contact and eliminating gaps that cause leakage.

This gasket set is ideal for anyone installing aftermarket headers on small-block Chevrolet, Ford, or similar platforms during a rebuild, stroker project, or performance upgrade. Whether you're sealing up a fresh 383, 406, or other performance builds, this gasket set provides the reliability needed for high-performance applications.