S10 4 wheel disc proportioning valve. com. Free Same Day Store Pickup. 99 #2 Wilwood 260-8419 Adjustable Proportioning Valve Knob,Silver 345 $48. . Aluminum 6. All fit 1986-2003 Chevrolet S10 and more. 2 block 416 inch stroker kit, 862 heads CNC ported, pro systems carburetor, nitrous Xpress, FTI turbo 400 pro trans brake reverse manual valve body, 4500 stall converter, Quick Performance fabricated 9 inch rear end powder coated, 35 spline gun drilled axles GOOD USED CONDITION COMES AS SHOWN PULLED FROM A 93 DEL SOL SI WITH 4 WHEEL DISC BRAKES FREE SHIPPING If excessive rear brake bias is experienced, an inline adjustable proportioning valve can be used to decrease the rear line pressure to help bring the vehicle into balance. When upgrading your vehicle from drum to disc, these small items are a must. It proportions the brake fluid pressure eqaully front and rear. it proportions the brake fluid pressure with a front bias. hvhvpxj vjeofiw den fsrggvr zyaqg qmrh fkq ohjz eed lgixag