2-7/8 FLANGE 4in.DIA 6in

The 2-7/8 FLANGE 4in.DIA 6in by K AND N ENGINEERING is a premium intake air filter adapter designed for builders and enthusiasts who demand precision-engineered components for custom intake manifold construction. This flanged coupling serves as a critical transition piece in high-performance air intake systems, enabling seamless ducting between filter housings and carburetor or fuel injection throttle bodies.

Whether you're fabricating a cold-air intake for improved volumetric efficiency or assembling a custom intake manifold, this adapter provides the structural integrity and precise fit required for reliable engine operation. Engineered with K AND N's commitment to quality, the 2-7/8 flange diameter is designed to connect with compatible intake ducting, while the 6-inch length provides adequate material for secure mechanical attachment and welding or clamping.

This adapter is ideal for street rod builders, engine swap technicians, and performance enthusiasts constructing custom intake configurations where OEM ducting may not suffice. Its robust construction minimizes vibration transmission from the intake tract to the engine bay, supporting consistent fuel delivery calibration in tuned systems.