Percy's High Performance 66087 Seal-4-Good Header Gasket Chevy Small Block Round Port

The Percy's High Performance Seal-4-Good header gasket is engineered to provide a superior seal for Chevrolet small block engines with round port headers. Designed for 1.90-inch round ports, this gasket eliminates the frustration of blown-out or burned exhaust gaskets that plague traditional paper composite designs.

Key Features:

• Multi-layered "dead soft" aluminum construction conforms to header flanges for an exceptional seal
• 1.90-inch round port design for Chevrolet small block narrow spread applications
• Virtually blowout and burnout-proof construction withstands extreme exhaust temperatures
• Fully reusable design allows for multiple installations without replacement
• Eliminates the need for constant retightening and gasket replacement
• Sold as a pair for complete header installation

Unlike traditional fiber or paper gaskets that compress, burn out, and leak over time, these aluminum gaskets maintain their sealing integrity through repeated heat cycles and removal. The dead soft aluminum material creates a custom seal by conforming to minor imperfections in mating surfaces, ensuring a leak-free exhaust system. Perfect for performance builds, frequent engine work, or anyone tired of dealing with exhaust leaks.