Header Gasket Spread Port

The Header Gasket Spread Port from Allstar Performance is a precision-engineered exhaust header gasket designed specifically for small-block Chevy engines equipped with spread port cylinder heads. This gasket serves as the critical seal between the cylinder head and exhaust manifold, preventing exhaust gas leakage and maintaining optimal engine performance. Whether you're building a performance engine, restoring a classic Chevy, or upgrading your existing exhaust system, a quality header gasket is essential for reliable operation and proper combustion chamber sealing.

Constructed with a steel core laminate design, the Header Gasket Spread Port features precisely sized port dimensions of 1.758 x 1.718 inches to match spread port head configurations. The laminated steel core construction provides superior durability and heat resistance compared to composite gaskets, allowing it to withstand the extreme temperatures and pressure cycles inherent in exhaust manifold applications. This multi-layer design prevents blowout and maintains a consistent seal throughout the engine's operating range, from idle to peak RPM, ensuring no unburned fuel escapes through gaps.

This header gasket is ideal for enthusiasts rebuilding small-block Chevy engines or those seeking OEM-quality replacement gaskets for their current setup. Installation is straightforward—simply position the gasket between the cylinder head and header flange before bolting down your exhaust manifold. The single-gasket format (sold individually) allows builders to purchase exactly what they need for their specific engine configuration. Proper installation with correct bolt torque specifications ensures maximum sealing performance and longevity in both street and performance applications.