Universal, Engine Air Intake Tubing Coupler, 90 Degree Reducer Elbow, 4.00" I.D. x 3.50" I.D. x 4.00" Leg Length - Black, 90 Degree Reducer Elbow, 4.00" I.D. x 3.50" I.D. x 4.00" Leg Length - Black, SILICONE REDUCER, Silicone Products, 3.5"x4"ID90DegSilTrn.