BBC Header Flange Kit w/Round Port

The Patriot Exhaust BBC Header Flange Kit with Round Port (Model H7887) is a precision-engineered exhaust manifold flange assembly designed for Big Block Chevy engine applications. This 0.375-inch thick flange kit features a 2.25-inch round port configuration, delivering the structural integrity and dimensional accuracy required for high-performance engine builds. The complete kit provides everything needed for secure header installation without compromise to fit or thermal management.

The 0.375-inch thickness specification ensures adequate material density to withstand combustion pressures and thermal cycling inherent to performance engines. The 2.25-inch round port diameter is matched to BBC (Big Block Chevy) intake and exhaust valve configurations, optimizing gas flow dynamics and scavenging efficiency. This flange kit simplifies header fabrication and installation by providing a ready-to-use interface point, eliminating the need for custom welding or porting work. The assembly weighs 6 lbs and measures 20 inches in length, making it suitable for standard engine bay applications where space and clearance are factory-specification parameters.

Buyers pursuing restoration, performance upgrades, or competition engine builds in Big Block Chevy platforms benefit from this kit's plug-and-play design. Whether for street performance, track duty, or engine swaps, the standardized flange interface reduces installation variables and ensures consistency across multiple builds. Patriot Exhaust's flange kit is appropriate for builders prioritizing reliable fitment and thermal efficiency without custom fabrication costs.

In the BBC engine aftermarket, quality flange kits serve as foundational components for headers, turbocharger manifolds, and exhaust systems. Proper port sizing and flange thickness directly impact seal integrity, exhaust scavenging, and longevity. This Patriot Exhaust offering provides verified compatibility with BBC specifications, making it a practical choice for serious engine work.