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      02-03-2020, 11:26 PM   #1572
Bartledoo
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Drives: 2011 E90 M3 6MT
Join Date: Aug 2015
Location: Seattle, WA

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Quote:
Originally Posted by dogbone View Post
Not sure what you're talking about. Do you have a pic?
Here's an example. There are lots of different shapes and sizes. They supposedly add substantial front downforce. AJ Hartmann has some data on their site about them. I think they refer to them as "tunnels" though.

With your vented fenders they could give you some of that extra front bite you've been wanting. I think the ACR with fender cutouts also has them, so you could finish your matching front end.
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