Hardened high quality steel blackbone RC two speed for HPI baja.  Get the best of both worlds for your Baja, Groud breaking launch and hit second gear for that top end speed you are looking for.  Don't choose between torque or speed.  Get both with this BBRC two speed.  This is for the two speed only.  You must purchase the gears if needed in the Low Ratio/2 speed baja gear section.