3in Ball & Socket Style Reducer w/O2 Sensor (1)

The HEDMAN 3-inch Ball & Socket Style Reducer with O2 Sensor (HED21117) is a precision-engineered exhaust collector reducer designed to adapt 3-inch inlet diameter piping to 2.25-inch outlet diameter with integrated oxygen sensor bung provisions. This component is essential for custom exhaust system fabrication and engine modification work where precise stepped reduction and sensor integration are required. The ball and socket design accommodates angular misalignment while maintaining a secure, leak-resistant connection.

Construction is heavy-duty steel with a natural finish, featuring a 3-bolt ball and socket flange for stable mounting. The O2 sensor bung allows direct integration of oxygen sensors into the exhaust stream—critical for engine control systems and emissions monitoring. All required hardware is included, eliminating the need for secondary sourcing. The compact dimensions (5.65 x 4.9 x 6.95 inches) and 1.8-pound weight make this reducer suitable for tight engine bay installations common in performance and custom engine builds.

This reducer is specified for custom exhaust manifold and header work, street rod fabrication, and engine swaps where stock exhaust plumbing is being replaced with larger-diameter primary piping. The ball and socket joint compensates for thermal expansion and minor geometric misalignment that occurs during high-heat operation, reducing stress on flange bolts and extending system longevity. The oxygen sensor mounting provisions ensure proper sensor placement for accurate closed-loop fuel control and diagnostics.

HEDMAN is recognized in the custom exhaust and performance aftermarket for cast and fabricated header and collector components built to exacting specifications. The ball and socket design is a proven engineering solution for high-vibration, high-heat exhaust environments where rigid flanges fail prematurely. This reducer ensures smooth transition from larger collector piping to secondary exhaust components while supporting sensor integration standards.