Spectre Performance 8741 Black 3" Air Duct Hose Attach directly to any airbox inlet, plenum, intake tube or mounting plate with a 3" O.D. to bring cold air into the engine Memory-flex design helps retain its position and bends Kit includes 28 inches of ducting and two threaded PVC couplers Thread multiple pieces together for longer applications Replacement threaded coupler - P/N 87411