The intake duct with DCI is useless... The OEM intake duct works off pressure/vaccum in which when you install the DCI is out the window..
So if your gonna keep your DCI, the stock intake ducts is useless.
Go grab a K&N recharge kit and clean those filters..
IF you had aftermarket air intake scoops in conjunction with the oem intake duct, then it would be useful
: ///M5 LCI with Evolve and RPi mods
E92 335i ||| FBO Heavy modded E90 LCI M-Sport 335i