The aFe Magnum FORCE straight reducing coupler joins 4.15" and 3.75" tube sizes across approximately a 2.35" length and is constructed from 1-ply reinforced high-temp silicone. It includes stainless-steel worm-gear #056 and #064 clamps for secure, corrosion-resistant connections and is designed to tolerate movement and vibration in industrial, truck and off-road intake applications. Intended for non-pressurized use.
aFe Magnum FORCE Intake Coupling Kit (4-1/4 IN ID to 3-3/4 IN ID x 2-1/4 IN L) Straight Black