If you run your 996 or Boxster on the track with the PCA, you'll need a fire extinguisher. And if you have an extinguisher, you'll need to mount it somwhere, and these brackets are the best you can get for doing that.

the 2020 is what most people will need. It bolts to the factory seat track hardware and will hold a 2.5lb extinguisher easily.

the 2030 is for those of you running aftermarket race seats with a sub-strap bar (r9030). This will mount to that sub strap bar and land the fire extinguisher right where you need it.