Redesigned XB2 ball differential offers enhanced performance. Recommended for all XB2 configurations whenever used on very-low to medium traction dust or clay areas to boost traction. The externally-adjustable ball differential is machined from HUDY Spring Steel and is furthermore hardened for extra durability and long lifespan. A high-quality carbide thrustbearing and carbide balls are included for ultra-smooth operation. Includes outdrive adapters made for usage with drive shafts with 2.5mm pin.