There's a couple of options.
You'll want to avoid boost creep but every engine can respond differently to a filter change.
- Safe option is a performance panel filter in the original box.
- Next up is a performance air filter in place of the original airbox.
-To get maximum air a 90 degree elbow off the turbo with a filter on the end is fairly effective.
You could end up with a lot of boost creep on that last option. Also removing the long factory intake run might lose you a bit of torque/drivability but it depends what you are after.