D-Box 2 AdjstbStbltyCntrlSystmHP 105409 HPI Racing HPI D BOX 2 ADJUSTABLE STABILITY CONTROL SYSTEM Adjustable Electronic Stability Control for Off Road & On Road Vehicles The D BOX 2 is the Secret Weapon for your driving and drifting! The HPI D BOX 2 is developed for RC cars of all types it's not just for drifters! From the Baja 5B to the Micro RS4 the D Box 2 is for you! You can use the D BOX 2 on slippery surfaces like wet paved surfaces, muddy conditions, loose dirt and wet