I have developed an intake kit for the M sport front bumper on E90 E91 E92 E93, which utilizes the empty space near the fog lights, and allows you to redirect airflow into your engine bay and straight to your intake.
I have used this kit in my N54 335i track car, and ran 25 psi boost on stock turbos which is more than 3 times the stock boost level, and got very impressive IAT results. I had a Wagner Evo 3 intercooler too to help me out, but I had the anything helps mentality and it granted great results.
Here is a datalog with IATs:
https://datazap.me/u/keninger/100ron-25-psi-stock-turbo?log=0&data=3-14-21
You can find the 3D model to this kit here:
https://cults3d.com/en/3d-model/various/bmw-e90-e91-e92-e93-m-sport-fog-light-intake-duct
