While I was at Bunnings, I picked up a fire extinguisher. I got the Quell 1Kg 1A:10B:E Auto/Recreational extinguisher that carries a CAMS approval.
It is my opinion that ALL cars, race or not should have an extinguisher by law. Hence all my cars carry one. I will be mounting it just infront of the drivers seat, below my knees for the easiest access possible.
UPDATE 3/9/07
I have installed the fire extinguisher. I located it on the floor in front of the drivers seat. This allows immediate access and keeps it out of the way. Where it is located, I can still fully adjust the seat back and forth, and with the seat adjusted correctly for me, it can't be seen by prying eyes from outside the vehicle.