This K&N molded hose transitions 4.00 inch to 3.50 inch inner diameters over a short tapered length and is intended for custom intake plumbing. Offered as a replacement or connector for do-it-yourself air intake assemblies, the part provides a shaped coupler to join mismatched tubing sizes. Use it where a molded taper is needed for reliable intake connections.
K&N Hose 4in To 3.5inid X 3inl Tprd Molded