Looks very similar to what I had in the bianca GTi6
I only had it in the clip and it never came loose no matter how hard I crashed, cornered or braked (and I had brembos) but I will admit I should have strapped it down.
Given the choice and financial free rein I would go for foam or CO2, preferably both but whatever get the biggest you can, I've tried putting out fires with small powder extinguishers at work and they do f*ck all but when I've used big CO2 or foam ones they have been highly effective even on a large volume of flamable liquid.
I only had it in the clip and it never came loose no matter how hard I crashed, cornered or braked (and I had brembos) but I will admit I should have strapped it down.
Given the choice and financial free rein I would go for foam or CO2, preferably both but whatever get the biggest you can, I've tried putting out fires with small powder extinguishers at work and they do f*ck all but when I've used big CO2 or foam ones they have been highly effective even on a large volume of flamable liquid.