i'm not sure why both BattleBoyz and Ivan put their ducts so much closer to the center - on pure aesthetics, moving it outward to be "centered" under the DYRL would look better. An inch or two can't affect airflow THAT much, can it? Just me
Anyways, i bought this kit off ebay:
https://www.ebay.com/itm/Revotec-51m...gAAOSwNkJaEFVO
51mm = 2 inch, matches the Stillen kit that includes backing plates
Z1, however, just came out with a new kit, that actually just came out:
https://www.z1motorsports.com/brake-...t-p-21496.html
2.5 inches = 71 mm i believe
For the passenger side, it would be easier to dump the washer fluid reservoir. If you have a vented hood its pointless anyways