Premium Brass Disc Brake Proportioning Valve Kit With Pre Bent 1/2 And 9/16 Inch Brake Lines Mounting Bracket And Hardware For A Slick Hot Rod Swap On Buick Skylark And Chevy Chevelle 64 To 72 Models

Brass Disc Brake Proportioning Valve Kit for Muscle Cars
✔️ High quality brass valve kit with matching lines and mounts

Getting your sixties muscle car rolling with this handy brass disc brake proportioning valve kit makes a real difference around town. Mechanics drop these into old Buick Skylarks and Chevy Chevelles to tame rear brake grabs and keep the nose from nosediving under hard stops. The whole bag comes ready to bolt onto existing master cylinders so you can swap over without cutting fresh floor pans.

✅ Precision machined brass housing handles heat cycle stress
✅ Direct cross reference for part numbers 172-2187 and 172-2174
✅ Packs pre bent stainless tubes sized for standard twin ports
✅ Bolts straight onto original firewall studs using included nuts

💡 How does a disc brake proportioning valve regulate fluid flow under heavy load?

Modern front discs demand more hydraulic volume than vintage drum setups were designed for. When you upgrade rotors without correcting the rear bias, passengers definitely notice that grabbing sensation down low. Installing a calibrated unit fixes the spread so you can stop confidently without fighting the steering wheel.

• Keeps piston engagement steady across repeated deceleration runs
• Avoids rear axle chatter when switching to performance compound pads
• Splits master cylinder output evenly for predictable road holding
• Stops tire squeal caused by delayed hydraulic response time

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