LDMINDA PV2 Brass Proportioning Valve for Disc-Front/Drum-Rear Brakes — 172-1353 Replacement, OEM-Fit

The LDMINDA PV2 brass combination proportioning valve is a direct-replacement disc-front / drum-rear brake valve (fits part 172-1353 / 25509419) built to OEM specs for classic GM, Chevy and many Ford cars and trucks.

If you're converting to front disc/rear drum brakes or servicing an older dual-reservoir master cylinder, this brass PV2 proportioning-combination valve replaces worn originals and restores correct hydraulic balance. Crafted from solid brass and engineered to match common factory dimensions and port sizes, it regulates rear-to-front brake fluid flow and includes a residual pressure feature for predictable pedal feel. The design mirrors original AC Delco style valves so it installs with typical OEM brake lines and fittings.

How does this valve restore braking balance after a drum-to-disc upgrade?

The proportioning section reduces rear brake pressure relative to the front so the new front discs don't overpower the rear drums, preventing premature rear lock-up. It contains internal metering and a residual pressure element to maintain correct line pressure and pedal response after bleeding.

• Direct replacement for 172-1353 and compatible with similar PV2 designs
• Corrects front/rear pressure distribution for disc/drum systems
• Includes residual pressure valve to preserve braking feel
• Fits common 1/2" and 7/16" brake line ports on dual-reservoir systems

Will this LDMINDA valve fit my classic GM or Ford vehicle?

This PV2 valve is a universal-style combination valve intended for most dual-reservoir master cylinders used on older GM, Chevrolet and many Ford models. It follows the same mounting and port conventions as OEM 172-1353/25509419 valves, making it a straightforward swap when replacing the factory unit.

• Compatible with many Chevy, GMC and Ford classic cars and trucks
• Designed for dual-reservoir master cylinder setups
• Brake line connections sized to common OEM standards (1/2" and 7/16")
• Works when upgrading front discs while retaining rear drums

What materials and performance features are included?

The valve body is machined from solid brass for corrosion resistance and long service life under brake-fluid exposure. It duplicates the functional features of the original AC Delco style proportioning-combination valve for reliable fluid metering and mechanical durability.

• Solid brass construction resists corrosion and seizing
• OEM-spec internal metering for predictable braking behavior
• Factory-style ports and thread sizes for easy installation
• Pressure-regulating and warning functions consistent with original designs

How simple is installation and what should I check during replacement?

Installation is typically a direct swap: remove the old valve, match line fittings and tighten to recommended torque, then bleed the brakes. Verify matching port sizes and use correct flare fittings; inspect lines and soft hoses for wear while you have the system open.

• Match part numbers 172-1353 / 25509419 or check OEM port layout
• Use flare wrenches and proper brake line fittings to avoid damage
• Perform a full brake bleed after installation and test pedal firmness
• Replace corroded lines or fittings for long-term reliability

Who is this for: The LDMINDA PV2 proportioning valve is aimed at classic car and truck owners, hobbyists restoring GM/Chevy or Ford vehicles, and mechanics doing brake upgrades from drum to disc up front. It's appropriate for anyone needing a durable, OEM-style replacement for 172-1353 / 25509419 combination valves who wants brass construction, correct metering features and straightforward compatibility with dual-reservoir master cylinders.