I installed a small louver in the Drivers Side US to let air flow easier through an oil cooler I have under the fender. It would also allow more airflow from the engine bay to help move some heat out for a regular configuration. It is a very simple mod, just cut hole, use nutserts/rivnuts, and install louver. The louver has been discussed before and is Volvo part number 3522732. Cost something like $19.00 US.
Bill
Bill