Download 2003 Audi S4 Carbonio Intake System Installation Instructions – Step 1: Using a Phillips head (star) screwdriver remove the 2 screws holding the factory air inlet scoop. The location of these screws is marked with arrows right. Once these screws are out, the entire inlet scoop can be pulled out. It is made up of 2 pieces between the front of the car and airbox and may need to be split to get it out. Step 2: On the side of the airbox is a 90 degree fitting with a plastic hose that leads to it. At this time detach the hose from the fitting. Note that some cars have a clip that holds the hose to the fitting. If so remove this clip first before separating. Step 3: Using a flat head screwdriver, pry off the plastic clip that attaches the airbox to the passenger side inner fender. The photo right shows an up-close view of the clip. It is best to pry out its center section and then pry out its perimeter housing. Step 4: Disconnect the wire that leads to the MAF sensor by depressing its fixing clip and by pulling apart. Note that the fit will be snug however if too much force is necessary, then the fixing clip is not being depressed enough. Step 5: Loosen the hose clamp that leads to the MAF sensor and separate the hose from the sensor. Step 6: There are 3 metal clips that connect cables to the factory airbox. Pull these clips off of the airbox. Alternatively, using a sharp knife, cut off the tape that fixes the wires to the metal clips Right is a close-up pic of one of these clips being pulled out of the airbox. Step 7: Loosen the two Philips head screws on the top of the airbox and pull the airbox lid off.