I'd be interested to see the data. All these intake options out there and no proof whether or not they improve airflow over the seemingly efficient factory unit. I'm not one of those people who believes that "a German engineer made it, therefore it cannot possibly be improved upon by the aftermarket", but without some numbers to back it up we're basically just guessing.
We have the following aftermarket options available:
-Fluid Motor Union
-Apikol
-Dahlback Racing
-Gruppe M ($4,700 for an intake? Get f**ked!)
-(others?)
Have any of them been dyno-tested?