I heard the O/S wheel arch lining on the S4 is vented to provide airflow to the airbox. It's priced up on VAGCAT at 14 EURO. Can anybody confirm? Looks like a nice cheap upgrade if so.
I agree, it's to let the air go through the ICs and straight back out, the air box is fed from the front, behind the grill, and sealed everywhere else to only allow cold air in, so wouldn't really benefit I'd have thought.
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