Got to speak to the Bimmerworld crew for the Conitinental Tire Challenge at Lime Rock on Friday! What great guys! They took off the wheels from the F30 so I could check it all out and wow. Stock calipers but with Performance Friction track pads/rotors. DUAL brake ducts but they did exactly what I had in mind with cutting the liner. They told me they ran into the same issue with the wheel and cut the liner out to get the duct in.
Differences they did was removing the stock duct from the front and adding the hose all the way to the front in the bumper. They also removed a portion of the dust shield and welded on a flange for the hose to connect to. The hose is bent more oval I assume for faster airflow exiting into the rotor. I also like the heat wrapping over the brake hoses so I will get the same to cover the stainless steel lines.
So... my plan is to cut the liner to fit the hose back above the sway bar and test fit it all. If that doesn't give enough clearance I will get into the stock ducting and fit the hose from the side and not the back exit of the duct.
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