>     So, other than the cold air snorkel to the brake duct, what is the 

>     difference between US and Euro airboxes?  I've put the $49.95 snorkel 
>     on and pulled the baffle out, what else is different?
>     
>     Jim Powell
>     Estoril Blue/Grey '98 M3/4
>     San Diego Chapter
>     Member # 135099

I just took a look at a Euro airbox on a 95 M3 a few days ago. Here's the comparison:

The front intake hole is the same as the U.S. version.

The outlet hole (to the HFM) has a 3.5 inch diameter; the U.S. box has a 3.0 inch diameter.

The Euro box does not have a baffle in the front intake hole; the U.S. version does.

The Euro box has a large rounded, curved baffle on the inboard side of the HFM hole; the U.S. version has a smaller baffle.

The Euro box does not have the small resonator that sticks out the side of the U.S. box.

The Euro box has bolt holes on the passenger side of the box for attachment of a heat shield.

Bob Stommel
Hoosier Chapter
Indianapolis
95 M3 (for sale: http://www.bmwforsale.com)