How to Install an AWE S

Audi Quattro 2002 Models
1. Let your engine is cool and remove the key from your ignition. Open your hood and locate the airbox, which is on the left-hand side of the engine compartment. Pull the trapezoidal trim cover of your airbox upward to remove it.
2. Pull the black, rectangular air box ducting pipe upward and toward you to remove it. Locate the connection harness of your mass air flow (MAF) sensor at the side of the airbox pipe and press the sensor plug in to disconnect the sensor. Locate the two ignition module connectors at the top of the airbox and press the plugs in to disconnect them.
3. Cut the zip-tie that holds the wires on the top of your airbox together and discard it. Use a thin screwdriver to pop open the plastic clips that hold the hoses to the top of the airbox.
4. Loosen the screw of the clamp that holds the air intake tube to the mass air flow on one end and use a pair of pliers to loosen the clamp on the end nearest the manifold. Remove the air intake tube and be careful not to lose or damage the rubber gaskets on either end of the tube.
5. Unhook the four metal clips around the perimeter of the airbox with your flat screwdriver. Pull the upper half of the airbox away from the lower half, while being careful not to pull on any wires or hoses. Remove and discard the existing air filter.
6. Place the top half of the airbox upside-down on a flat surface so that the cylindrical end faces you. Grasp and pull the clips at the base of the cylinder, which is the MAF sensor, and remove the sensor by pulling it away from the airbox.
7. Insert the tube of your S-Flo kit into the center of the cylinder base so that the non-flanged end goes in first. Center it so that there is sufficient room to install the S-Flo conical air filter over it. Do not let the O-ring of the S-Flo tube slip below the flange on the lip of the tube.
8. Seat the MAF sensor around the S-Flo tube and into the cylinder base of the airbox. Apply a bit of soapy water to the outside flange of the sensor if you have difficulty inserting it. Close the metal clips around the catches on the sides of the sensor once you have securely re-installed the sensor.
9. Slide the stem at the bottom of the S-Flo conical air filter onto the portion of the S-Flo tube that protrudes from the inside of the top of the airbox. Secure it to the tube with the silicon coupler provided in your S-Flo kit. Pull the hose clamps on the filter tight but not overly tight and fasten them by turning each clamp screw clockwise (away from you) with your screwdriver.
10. Position the top of the airbox onto the bottom so that the filter points inward. Disregard any slight contact between the filter and the edges of the box housing.
11. Reassemble the airbox and reconnect all tubes and pipes. Use the provided tie-down to re-tie your ignition wires to the airbox. Plug your manifold and ignition cables back into their harnesses. Replace the airbox trim cover and close your hood. You can now drive your Audi Quattro as you usually do.
Installation for 2008 to 2010 Models
12. Let the engine cool and remove the key from the ignition before you open the hood of your Audi.
13. Pull the connector at the end of the thin breather hose that is located near your throttle body and connected to your intake hose off to remove the breather hose. Unclip the two rubber line connectors leading to the intake hose.
14. Loosen the clamp screws on the clamps at each end of the intake hose with a flat screwdriver. Remove the intake hose.
15. Use a Torx T25 screwdriver to loosen all screws holding the airbox lid to the airbox. Pull the lid off the airbox and place it upside-down on a flat surface so that the round core of the air filter assembly faces you.
16. Press down on the metal clip located below the plastic hose collar and release the collar from the airbox lid. Use a Torx T15 screwdriver to remove both of the screws that hold the air filter element onto the lid. Set the screws aside. Pull off the O-ring located beneath the air filter element and discard it along with the filter element.
17. Line up the rubber protrusions on the sides of the S-Flo filter with the grooves on the inside of the airbox lid and slide the filter into the lid. Clip the two metal clips onto the new filter and fasten it to the lip of the lid with the two supplied M4 bolts. Tighten the bolts with a 3 mm hex (Allen) key wrench.
18. Line up the plastic hose collar mounting holes with the screw holes in the lid. Fasten the hose collar back to the lid with the screws you removed in Step 5. Tighten the screws with a Torx T15 screwdriver.
19. Thread one of the cable ties supplied with your S-Flo kit into the smaller of the two holes on the EVAP bracket included in the kit.
20. Affix the other end of the EVAP bracket to the strut tower stud (protruding bolt) which is located on the front right of your hood frame. For A5 3.2L V6 engines, remove the 13-mm nut that holds the strut tower to the hood and make sure that the bracket does not touch any plastic hose. Fasten either the provided M8 nut and washer for the B8 S4/S5 3.0 T kit or the original 13 mm nut over the bracket and tighten it with a 13 mm wrench.
21. Secure the EVAP hose to the bracket with the cable tie as necessary and thread the pointed end of the tie through the fastener end before pulling the tie tight to secure the hose. Cut off the excess tie material.
22. Thread the remaining cable tie through the hole in the short protrusion of the fuel line bracket that is included in your S-Flo kit. Attach the longer protrusion of the bracket to the airbox lid with the airbox lid bolt and fasten the bolt. Secure the fuel line to the bracket with the tie, thread the pointed end of the tie through the fastener end and pull it tightly. Cut away excess tie material.
23. Install the AWE silicone intake hose that is provided with the S-Flo kit in place of the factory-supplied intake hose that you removed in Step 3 and fasten it with the clamps provided on each end. Reinstall the breather hose that you removed in Step 2 onto the plastic hose barb near the throttle.
24. Close your hood. You are now ready to drive your car as usual.