Removing the filter can instantly release more power and torque across the complete rev range.
Over time the standard filter will become blocked and will need replacing at a cost of nearly £1000. Removing the filter can prevent this cost as well as removing the need to take the car for a 30 mile drive in order for the filter to perform its regeneration cycle. Should you then want to sell the car or fit the filter back on it can be done in around 1 hour.