FG MODELLSPORT 12S UPGRADE KIT. Sliding block for different size pinions with precise gear mesh adjustment. Replaces stock motor mount without any adaptations. Dual Cooler support. Supports 70mm, 58mm and 56mm motors. Ex: Castle 2028, Hobbywing 70125. Center ESC Support (fits XLX, XLX2, MAX4, MAX5, MAX5 G2 and others). Dual wide battery tray to fit with big ESCs. Replaces conversion kit from FG part no. Sliding Motor Mount. Dual Cooler Support. Dual wide battery tray. All products are manufactured on demand.