Loosen the hose clamp at the air filter housing-end of the duct, disconnect the duct hose clamps and any PCV hoses. Then, loosen the hose clamp at the 
Throttle Body-end of the duct. Disconnect any crankcase vent hoses or pipes from the duct as necessary and remove the air intake duct. Installation is the reverse of removal. For the air filter housing, disconnect the MAF/IAT sensor electrical connector, loosen the intake duct hose clamp and remove the housing fasteners. Next, loosen the air intake duct clamp and separate the hose from the air filter housing. Remove the air filter housing fasteners and lift the housing out. You may need to pull firmly to disengage the rubber mounting points. Installation is the reverse of removal.