The aFe Magnum FORCE straight reducing coupler is a spare-part reducer in black with a 4-5/32 in to 3-3/4 in ID transition and a 2-11/32 in length. Made from reaction injection molded polyurethane with stainless steel worm-gear clamps, the coupler allows secure hose connections, resists clamp corrosion, and uses 60 Shore A polyurethane for long service life in intake systems.
aFe Magnum FORCE Performance Accessories Coupling Kit 4-5/32in x 3-3/4in ID x 2-11/32in Reducer