This steering box is engineered to be the ultimate in bolt-on power steering performance for those vehicles used for more off-road than on road driving. Designed to be the most powerful and nimble steering with the least amount of effort, the SB1 features the largest piston available and a special spool valve to increase turning force. Total Bearing Control locks in the sector shaft for smooth steering. This box combined with an AGR Super Pump will provide the maximum available turning force in a steering box combination.