Decided to buy a panel filter from JR / Jetex. Build quality is nice, but could be better. Fitment looked like 100%, but unfortunately that wasn’t the case.

I tried to modify it a little bit, but that went wrong and I had to throw it away.

Volvo S80 2.4T JR Uprated Panel Filter

Volvo S80 2.4T JR Uprated Panel Filter