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Upgrade your 67-72 Chevy or GMC truck's braking system with our high-performance Hydrobooster Disc/Disc Power Brake Booster Master Cylinder Kit. This comprehensive kit includes a master cylinder with a 1 1/8" bore and a PV4 proportioning valve, designed specifically for disc/disc brake setups. ***(We also have PV2 Disc/Drum proportioning valves as well)*** The hydroboost system delivers significantly greater braking pressure compared to traditional vacuum boost systems, ensuring enhanced stopping power and control for your truck.
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