More pressure is applied to the front giving a much better overall braking performance.
New Aluminum Knob Adjustable Disk Brake Proportioning Valve Universal Type
UNIVERSAL Street Rod CHROME DISC DISC Brake Proportioning Valve PV4 Self Adjust
Universal Adjustable Brake Proportioning Valve for Hot Rods - Enhance Your Disc
Universal Aluminum Knob Adjustable Disk Brake Proportioning Valve 100-1200PSI
UNIVERSAL Street Rod Brass DRUM DRUM Brake Proportioning Valve PV4 Self Adjust
Universal Disc Drum Brake Proportioning Valve PV4 w/ Line Kit for GM Chevy Buick