3.5in Flange

The Schoenfeld 3.5in Flange (MPN 350CR) is a precision-engineered collector flange designed for exhaust system applications in high-performance and tactical vehicle platforms. Built to exacting standards, this three-bolt flange serves as a critical interface component where durability, alignment, and longevity directly impact system integrity. Law enforcement and military personnel who maintain specialized vehicles demand components that meet OEM specifications and perform reliably under demanding operational conditions.

Manufactured from solid steel in natural finish, the 3.5in Flange features a 3.5-inch inner diameter with 0.25-inch thickness, delivering the structural rigidity required for secure exhaust manifold-to-collector transitions. The three-bolt configuration ensures positive clamping force while allowing for proper gasket seating and thermal expansion—critical factors in high-heat exhaust environments where component failure compromises vehicle performance and safety. Steel construction resists warping and corrosion better than cast alternatives, maintaining dimensional accuracy through repeated thermal cycling and vibration exposure typical of extended tactical operations.

This flange is ideal for technicians, fabricators, and vehicle maintenance specialists rebuilding or upgrading exhaust systems on specialized platforms. Whether replacing worn originals or constructing custom exhaust configurations, proper flange selection prevents exhaust leaks, maintains back-pressure efficiency, and eliminates costly mid-operation failures. The compact 4.8 x 4.85-inch footprint and lightweight 0.39-pound design facilitate installation in tight engine compartments without adding unnecessary weight. Compatible with standard three-bolt collector configurations, the Schoenfeld 3.5in Flange represents a cost-effective, reliable solution for professional-grade exhaust system assembly and repair.