SBC LT1 D-Port Copper Exhaust Gasket Set

The SBC LT1 D-Port Copper Exhaust Gasket Set is a critical sealing component designed for small-block Chevrolet and LT1 engines using D-port cylinder head configurations. This gasket set addresses one of the most common leak points in high-performance engine builds—the exhaust manifold-to-head interface. Whether you're rebuilding a classic 350 or installing modern LT1 heads on a traditional block, proper exhaust gasket selection directly impacts horsepower delivery, exhaust scavenging efficiency, and long-term engine reliability.

SCE Gaskets engineered this set with copper construction, a material choice that matters for thermal cycling durability and reusability. Copper gaskets handle the extreme temperature swings inherent to exhaust ports—cycling from ambient to 1,200+ degrees Fahrenheit repeatedly—without degrading like traditional composition gaskets. The D-port designation ensures precise fitment to the distinctive D-shaped port geometry found on LT1 heads and certain SBC variants, eliminating blow-by that would otherwise rob performance and create vacuum leaks. The gasket set weighs just 0.6 lbs, consistent with a complete manifold-side application for both sides of the engine.

This gasket set is essential for engine builders, performance mechanics, and enthusiasts undertaking head swaps, turbo conversions, or complete engine rebuilds where OEM gaskets have failed or deteriorated. Installation requires basic mechanical knowledge and torque-to-spec fastening—typically 15–25 ft-lbs depending on manifold design—making this a straightforward DIY or shop task. Compatible with direct-port D-configuration heads common in 1992–present LT1 engines and aftermarket SBC builds, the set delivers the durability expected in street, strip, and weekend warrior applications where reliability under sustained heat is non-negotiable.