GKTECH WILWOOD BRAKE BIAS VALVE 260-12627 (Order in)NOTE: This item is specially ordered from GKTECH Australia and usually takes around 3 4 weeks to arrive. Listing is for: 1x Brake bias valve The new generation of adjustable proportioning valves combines the latest refinements to deliver precise pressure metering and strength from a compact forged billet design. Pressure adjustments range from 150 1200 PSI and provide for a maximum decrease of 57% in line pressure, the most of any available valve.