Doug's Headers H7863 Header Flange Kit Small Block Chevy Oval Port

The Doug's Headers H7863 is a precision-engineered header flange kit designed specifically for Chevrolet Small Block engines (265-400 cubic inches). This complete kit provides everything needed for custom header fabrication or header repair projects.

Key Features:

• Heavy-duty stamped steel construction with 3/8-inch thick flanges for superior strength and durability
• Oval port design measuring 1.625 inches, optimized for 1-5/8 inch primary tube diameter
• Stock bolt pattern for direct compatibility with small block Chevy cylinder heads
• Includes premium header gaskets rated to 1,100°F and capable of handling exhaust pressures up to 3,700 psi
• Complete with mounting hardware (header bolts) for convenient installation
• Sold as a complete kit (pair of flanges)

These header flanges are ideal for building custom headers, replacing damaged flanges, or modifying existing exhaust systems. The precision-machined design ensures an exact port match for optimal exhaust flow and reliable sealing. Doug's Headers has been a trusted name in performance exhaust components since 1958, delivering quality parts that enthusiasts depend on for both street and racing applications.