The GPM MGG4951V2 drive shaft set upgrades the ARRMA Granite GROM drivetrain with components selected for strength and dimensional accuracy. Shafts are manufactured from 4140 carbon steel to deliver improved torsional stiffness and wear resistance. Hex adapters are machined from 7075-T6 aluminum for concentric seating and repeatable fitment, while CNC machined steel wheel stub axles replace the OEM dog bone and plastic wheel shafts to reduce failure points. Pin diameter has been increased from 1.5mm to 2mm to enhance axle retention under load and maintain alignment at speed.