Spoke with Mugen USA today. It appears the they will be shipping 3 versions of the truck:
Stardard MBX5T
MBX5T Prospec
MBX5T Prospec with motor & pipe.
Delivery should be within the next 3 weeks.
http://www.mugenseiki.co.jp/mugen/spec-mbx5t_e.htm
Mugen has published some info about their new Prospec Truggy, it comes with the following options:
B0104 Fuel Filter S, E0101 Front Upper Plate, E0102 Center Diff. Mount Plate, E0117 Titanium Rear Upper Arm, E0118 Rear Lower Arm Support, E0119 Front Lower Arm Support, E0123 Lower Arm Shaft, E0124 Rear Lower Arm Shaft S, E0125 Rear Lower Arm Mount, E0126 Al. Rear Upright, E0139 Al. Front Tension Rod, E0140 Al. Rear Tension Rod, E0301 Radio Plate, E0311 Servo Saver Plate 5mm,E0522 Front Damper Stay 5mm, E0523 Rear Damper Stay 5mm, E0703 One-Piece Engine Mount, E0818 Titanium Steering Rod 76 (φ4), E0819 Titanium Turn Buckle Rod 47