This MOC is a new version of the Rock Raiders 4980 Tunnel Transport.
This version have several functions:
Detachable engines and cabin. This combination is a speeder for acrossing small tunnels.
It has also landing gear what's adapt to the surface
Bobcat can be attached with the magnet to the helicopter
Comparisson between the Tunnel Transport 2.0 MOC and the original 4980 Tunnel Transport set.