As in flares and not trousers or wheel arches.
I don't know if the other Pile cars have them (or the Skyline for that matter), but my S-Cargo has a flare tucked under the left hand dashboard.
I've had this translated, which whilst not perferct English, is better than my Japanese. Hopefully it will bring some insight and amusement to others.
Regards
Martin
EMERGENCY FLAME TUBE FOR MOTOR (burns for 5 minutes)
Manufactured: 2002.4
Usable until: 2006.3

How to use:
Squeeze and pull out the main unit. Turn it round and insert in the bracket (outer tube)
Rub with material on the head of the cap
(Modes of use):
a) Hold and wave it
b) Lay it on the ground
c) Put it upright on the ground

WARNING
Use it at level crossing or motorway as emergency signal
Keep children away
Don’t use it near fuel or inflammables
Don’t point it at the face or body when the flame is burning
Please keep it in the bracket
Please replace once it is expired