Doug's Headers 66031 Header Gaskets SBC D-Port - Seal-4-Good 1.375

The Doug's Headers 66031 Seal-4-Good header gaskets are engineered specifically for small block Chevy (SBC) engines with D-port cylinder heads. These high-performance gaskets feature a 1.375-inch port diameter designed to provide a precise seal between the cylinder head and exhaust headers.

Key Features:

• Designed for small block Chevy D-port applications
• 1.375-inch port opening diameter for optimal exhaust flow
• Seal-4-Good construction for superior sealing performance
• High-temperature resistant materials prevent blown gaskets
• Helps eliminate exhaust leaks and improves engine performance

Doug's Headers Seal-4-Good gaskets utilize premium materials that withstand extreme exhaust temperatures while maintaining a reliable seal. The proper port size ensures correct alignment with D-port cylinder heads, preventing exhaust leaks that can reduce power and create unwanted noise. These gaskets are an essential component for any header installation or replacement on small block Chevy engines.