It has IM engines nacelles and a complete set of flaps - with track guides - the whole lot!
One internal pocket, two outer inset pockets with flaps.
The hood liner was removed as was the front valence and mud flaps - these would get torn off pretty quickly anyway.
In many aquatic larvae we find that all the spiracles are closed up, or become functionless, except a pair at the hinder end which are associated with some arrangement - such as the valvular flaps of the gnat larva or the telescopic " tail " of the drone-fly larva - for piercing the surface film and drawing periodical supplies of atmospheric air.