I added the E21 intake manifold to my 2002 as part of the EFI conversion. From the bottom of the throttle body, I used a silicone elbow, some 3 inch OD tube and a cone filter. This support press fits onto the bumper retaining bolt and holds the filter in place. You may need to adjust the saddle radius based on your filter. Mine is 6.25"x4.75"x5.25" (W1xW2xH). I added the Fusion360 file so you can modify as needed.