The Pyroflex one for the engine bay, fit and forget. Its full of fire supressing gas, so when it burns though the fire gets doused directly before it gets hold.

Any comments on weather this is a good idea or not?
Its quite a hefty pipe (8mm) like a hosepipe, but could be a good insurance against a gutted car? Clearly won't deal with a big fire but could buy seconds to get out or to use a proper extinguisher?
Have e-mailed them for a quote and some more specs.