Damn...so this is where my thread split off!
Well, just to clarify there is of course a difference between having a fire extinguisher for safety reasons vs having a fire extinguisher for showing off reason. If I can see your extinguisher zip-tied to your fake roll bar, or interior A/B pillar a mile away and:
1. you're not in your helmet + HANs,
2. you're not on the race track,
3. there are no corner workers nearby,
then that's showing off.
If you have it for safety reasons, by all means. Just a thought, BMW has a solution to this extinguisher storage, ie under the seat:
Another pic:
http://www.tmk.com/bmw/6F5S0476-l.jpg
Same idea when I installed the BMW storage box under the seat here:
http://www.smartcarofamerica.com/for...966-post1.html
In fact that storage box is a first aid kit box. The original idea was to have the kit on the passenger's side and the extinguisher on the driver's side.
IMO, if anything happens while driving, the extinguisher has to be within immediate reach.