Collector Flanges - 1pr 3-Bolt 3-1/2in Dia.

The Patriot Exhaust Collector Flanges – 1 pair 3-Bolt 3-1/2in Dia. (H7261) are precision-engineered exhaust manifold interface components designed for high-temperature engine applications. These collector flanges provide a reliable seal between the exhaust manifold and the collector pipe, essential for maintaining exhaust system integrity and minimizing heat loss in performance and heavy-duty engine configurations.

Each pair features a 3-bolt connection pattern with a 3-1/2-inch inner diameter opening, constructed from durable steel in natural finish. The 0.234-inch thickness provides adequate material mass to withstand thermal cycling and vibration without warping. Gaskets and hardware are included, eliminating the need for separate sourcing and ensuring proper gasket compression during installation. The natural steel finish allows for custom coating or anodizing if additional corrosion resistance is required for specific environmental conditions.

This product is suited for engine builders, restoration specialists, and performance shops working on custom exhaust systems for trucks, hot rods, industrial engines, and marine applications. The standardized 3-bolt pattern ensures compatibility across a wide range of manifold and collector configurations. Proper installation requires careful torque sequencing and gasket sealing compound application to prevent exhaust leaks and maintain system efficiency.

Patriot Exhaust is recognized for manufacturing quality exhaust components that meet OEM and aftermarket standards. The inclusion of gaskets and fasteners with this pair reflects attention to complete assembly requirements, reducing downtime during engine work or repair cycles.