Percy's High Performance 66011 Header Gasket Chevy SB Round Port - Seal-4-Good 265-400 1.5in

The Percy's High Performance 66011 Seal-4-Good header flange gasket is engineered specifically for small block Chevrolet engines ranging from 265 to 400 cubic inches. This high-quality gasket features a round port design with a 1.5-inch port diameter, providing an optimal seal between the cylinder head and exhaust header.

Key Features:

• Designed for Chevrolet small block engines (265-400 ci)
• Round port configuration with 1.5-inch diameter opening
• Seal-4-Good construction for superior sealing performance
• Header flange gasket for exhaust system applications
• Helps prevent exhaust leaks and maintains proper backpressure
• High-temperature resistant materials for durability

Percy's Seal-4-Good gaskets are constructed to withstand the extreme heat and pressure of high-performance exhaust systems. The precise round port design ensures proper alignment with both the cylinder head and header flange, creating a reliable seal that helps eliminate exhaust leaks, improves engine performance, and reduces noise. Ideal for street performance, racing, and restoration applications on classic and modern Chevy small block engines.