What are the flaps hanging down from under my Forester? - Subaru Forester Owners Forum
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post #1 of 6 (permalink) Old 09-09-2012, 08:51 PM Thread Starter
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What are the flaps hanging down from under my Forester?

Today when I was walking towards my 2013 touring, I noticed something black hanging from under the car (in the area in front and to the side of the rear wheels and on both sides). When I looked under the car, the pieces are attached to the bottom of the car and they look like small mudflaps hanging down with the opening to the back of the car...but they are not mudflaps. What are these ??? Sorry I don't have a pic to post. Thanks!
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post #2 of 6 (permalink) Old 09-09-2012, 08:58 PM
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Airflow deflectors, cut down on the wheel's wind resistance.

Lots of modern cars have 'em.

http://www.rx8club.com/exterior-appe...er-flap-91360/

"They don't think it be like it is, but it do"
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post #3 of 6 (permalink) Old 09-10-2012, 02:52 AM
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Yup. Those are there to cut down on turbulence and promote stability at highway speeds. That being said, I had removed mine for about a year and never lost any fuel mileage or felt unstable on the highway...
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post #4 of 6 (permalink) Old 10-27-2012, 08:20 AM
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Anyone have the subaru name or part number for these? We bought our '09 used and the passenger side deflector is missing.

Update:

Just so its on here in case anyone needs to know in the future:
The flaps can not be purchased separately, you must buy the larger plastic piece they slide into. Just so happens this one part is missing from all the part diagrams and my parts guy had to call Subaru directly. For the passenger side (RH) the part # is 42045SC000 "Fuel Tank Protector" and is $49.04.

Last edited by miller542; 11-02-2012 at 09:39 PM. Reason: new info
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post #5 of 6 (permalink) Old 12-01-2012, 04:51 PM
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I just took mine off will trim to use as a bracket to hold fender and splash guard together. But here in Kansas I think they got caught by the wind more causing more instability. They may be good for head on wind but not wind coming at em from behind.....
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post #6 of 6 (permalink) Old 12-01-2012, 06:55 PM
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Without them the car becomes somewhat unstable at speeds greater than 185 mph....;)
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