Brake Bias Proportioning Valve Pressure Regulator for Brake Adjustment 1/8-27 NPT Pressure Regulator Screw Knob Type quality assurance tested, more responsive, less expensive, easier to install. Pressure adjustments range from 100-1000 PSI. Provide for a maximum decrease of 57% in line pressure. Allow you to fine tune the front to rear braking balance. Brings a much better overall braking performance. Installation Instructions: 1.Drain the brake fluid before you do anything else. 2.Use the two 0.25inch body holes to secure the valve to a mount. 3.Connect the "IN" port to the pressure line coming from the master cylinder. 4.Connect the line going to the calipers to the "OUT" port. 5.Rotating the adjuster knob clockwise until it is all the way in. 6.Bleed the brake and check for any leaks at the valve or its fittings. 7.Do some test braking to adjust the bias before it works properly. Cautious: Make sure the valve isn't rubbing against any other brake lines or contact with the hood. Operation: The knob rotated all the way out (counter-clockwise) will provide a maximum pressure reduction of 57%. Rotating the know in (clockwise) will incrementally increase line pressure, up to full pressure. All items are New unless stated otherwise on the listing. We sell DIY (Do It Yourself) Items with a few exceptions. We take no responsibility in teaching you how to install. Professional installation is strongly recommended. Colour:Silver Material:Aluminum alloy Package Contents: 1 x Brake Proportioning Valve 2 x 1/8-27 NPT Inlet/Outlet Ports Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_ _x000D_