BMW M3 Forum (E90 E92) - View Single Post - MPorium M3 Aluminum Undertray

tbone28 · 04-26-2020, 12:11 PM

On the OEM setup, there is a felt box on each end that sits lower than the main tray. I don't see that on the MPorium version. What is the purpose of that felt box? aerodynamics?

04-26-2020, 12:11 PM	#2
tbone28 vvvvvvvvvvvvvv 333 Rep 2,305 Posts Drives: ^^^^^ Join Date: May 2012 Location: Bay Area, CA iTrader: (18)	On the OEM setup, there is a felt box on each end that sits lower than the main tray. I don't see that on the MPorium version. What is the purpose of that felt box? aerodynamics?
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