98904 DriftART4 Wheelbase Master For DA4/DA3 - CNC made Alu. baseplate. -Stepless djustable Wheelbase from 90mm to 123mm. -With precision measurements of wheelbase and servo position. -The lightweight and narrow body design makes the car body more concise and slender.Combined with the reinforced ribs, it provides excellent rigid support. -Strengthening the support for the rear of the chassis makes the installation of the gearbox easier and more stable.