The “D3” (Duo3) is a pro racing motor designed for 2 & 4wd, 1/12th & 1/10th on-road, oval and off-road. Stronger gauss neo magnet rotor for more low end torque. The stator with higher temperature wire and a faster switching sensor board design. Fully adjustable timing. Heavy duty low drag ball bearings. 1-4 cell Li-Po use with correct gearing.