A necessary part of any performance braking system! This proportioning valve features a rotary knob with a knurled grip to allow for the finest incremental adjustment of front to rear brake bias. This further enhances the effectiveness of the entire system to prevent that dreaded rear brake lock-up by reducing line pressure up to 60%. Includes 2 adapter fittings for use with 3/16'' brake lines. Finished in a durable black anodized finish with the JEGS logo laser etched on both sides for up or down knob placement.