XPS 8960, install a dust filter?

Anything is possible.  You can try this cut to fit polyurethane foam filter.  Although it is not as effective as the predesigned filters on OptiPlex.  While the filters on supported machines have 70 to 80 percent of front panel  opened for intake air, the XPS 8960 have less than 50 percent opening at front surface for air intake.

With some creative, you can also setup filters inside the machine at each possible air vent and fans.  They should collect and trap dust when air flowing through them. 

Because of the environment and location of machine are different from user to user, it's hard to say if the effectiveness is the same for everyone.  You can try it out and see the amount of dust it can collect and making judgement for yourself.

XPS 8930 . . . typing this to get the minimum 20 characters

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I was thinking of something a little more elegant, perhaps.

When I was looking inside my computer today, while installing RAM and an extra NVMe SSD - which, for the purposes of my warranty, I did not actually do - I noticed that there is some space between the intake fan and the metal enclosure in front of it. A dust filter might fit into that space, but it would mean seriously disassembly, which I'm not about to do.

Installing RAM and an additional M.2 SSD will not void your warranty.

You cannot see the filters lacking elegance when the front shroud it installed.

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@ProfessorW00d​ hello. Just purchased a 8960. What modifications are in the photo you submitted to the case and power supply? I'm mostly interested in the power supply set up you have done. Ty

@BuzzC137​   your XPS 8960 is a much different design than the XPS 8930. One of the biggest differences is the swing-out PSU contraption, which was my first case modification.

Then the case was completely gutted and painted black.

Then I added liquid cooling for the CPU, graphics card, and RAM.

Another big difference from your XPS 8960 is that my PSU is standard ATX format. I replaced the Dell OEM PSU with an 850 watt fully modular Seasonic Focus, which sits behind the rig on a one inch thick block of billet aluminum (for no particular reason).

I am not sure what you are trying to do with your XPS 8960, but whatever it is should be much more simple without the PSU swing-out contraption, which completely choked off all air flow inside the case.

The side panel air intake isn't much of a problem. The front panel intake is a challenge. And there are also intake vents on the side of the front panel XPS-8960..what to do??