The Spektrum™ Firma™ 4500Kv Brushless Motor is the perfect replacement for the GROM BLX 4x4 vehicles. This motor features a low-cog 4-pole rotor design, CNC machined aluminum housing, insulated high-purity copper windings, a high-quality alloy steel 3.17mm-1/8 in. output shaft, and precision bearings for durability and smooth rotation.