Handcrafted Brass Proportioning Valve Delivers Rock Solid Hydraulic Control For Street Rods And Trucks Featuring Disc Front And Drum Rear Brake Setups Compatible With Gm Gmc Chevy And Ford

Premium brass brake bias valve for muscle cars and hot rods
✔️ Heavy duty brass valve handles disc front drum rear setups

This single combination proportional valve splits hydraulic pressure evenly when you upgrade to discs up front while keeping drums in back. Mechanics slap it onto almost any factory dual reservoir master cylinder on old school trucks and street rods to stop the rear wheels from locking up during hard stops.

✅ Cast from tough solid brass that stands up to daily road grit
✅ Built in pressure cutoff and dash warning switch for safety
✅ 1/2 in port and 7/4 in line accept standard fitting upgrades

💡 What size ports matter most when swapping a master cylinder on a classic truck?
Getting the thread pitch dialed in keeps fluid moving smooth and avoids air pockets under your feet. Here is how you pick the right ratio plug-in to match your setup:
- Thread match prevents cross threading the steel lines straight
- Port sizing balances stopping power across disc front drum rear setups
- Pressure split protects rear shocks from squealing tires on wet roads

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