Originally Posted by N0OS3
i agree with the first response about fitment on E90... i have a lot cut away from the ducts till i decided instead of making them brake ducts, i'm going to do some fiberglass work and make them into 3.25" Ram Air ducts and connect them to the OEM air box... project is in the works right now but haven't quite perfected the smoothness of the inside duct.
EDIT: i just used 2 aluminum (only aluminum, other materials will rust) screw/bolt on each duct and that worked for me.
Thanks for the post.
Anyone have some experience trying to do this on an e92?