While driving my 2012 M3 ZCP the other day, I heard a lot of scraping coming from the front bumper. After inspecting behind the splitters, I noticed these two black felt things that worn torn badly and hanging off of the body.

I'm wondering whether it makes sense to replace these parts since they are made of felt (really?) and will most likely tear again and again and again. I have read that they might help aerodynamics and keep debit out of the engine but not sure how much of that is true. Is there a high performance alternative (e.g. carbon fiber, plastic) that might actually last?

I didn't think BMW could made a design error worse than the cupholders in this car but I think we have a new winner.

M3 Splash Shield-Under Engine Side Cover Left 51757896419
M3 Splash Shield-Under Engine Side Cover Right 51757896420