These air intake ducts have a square opening with integral mounting flange. The outlet is stepped to allow for different ducting pipe diameters.Smooth finish for improved airflowStepped outlet to suit different pipe diametersIntegral flange for easy mountingChoice of intake sizes (130 x 130mm or 100 x 100mm)The ducts are manufactured from robust rigid plastic and are ideal for bumper or light aperture mounting. When used with suitable ducting hose these ducts can provide cool air to critical areas such as brakes, air intakes or radiators / intercoolers.Available in 2 different sizes:100 x 100mm square with 51/63mm stepped outlet130 x 130mm x square with 63/76mm stepped outletPlease note: Due to tolerances in the moulding process dimensions quoted are approximate.