For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4
For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 is a brass brake proportioning valve system priced at $54.63. Includes pre-bent lines and side-mount bracket. Ideal for classic GM disc brake conversions to prevent rear wheel lockup under hard braking.
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Key features
- Brass proportioning valve for durability
- Includes pre-bent 1/2 and 9/16 lines
- Side-mount bracket for master cylinder
- Self-adjusting rear pressure control
- Complete kit with bolts and hardware
- Universal fit for GM disc-disc swaps
- Disc-brake optimized valve function
Pros
- +Saves time with pre-bent brake lines
- +Reduces risk of rear brake lockup
- +Durable brass construction resists corrosion
- +Simple side-mount design fits tight spaces
- +All-in-one kit lowers installation complexity
Cons
- −Not vehicle-specific; universal fit may need minor adjustment
- −No instructions included
About For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4
What is For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4?
This complete disc-to-disc proportioning valve kit (Part # PV4) is engineered for classic GM vehicle brake upgrades. Constructed from durable brass, it includes a self-adjusting proportioning valve, pre-bent brake lines for 1/2-inch and 9/16-inch master cylinder ports, a side-mount bracket, and mounting hardware. Designed for universal fitment, it ensures safe, balanced braking during disc brake conversions on vintage muscle cars and trucks.
Key features
- Brass Construction — Corrosion-resistant valve body ensures long-term reliability and leak-free performance.
- Pre-Bent Brake Lines — Includes lines for 1/2 and 9/16 master cylinder ports, reducing fabrication needs.
- Side Mount Bracket — Mounts directly to the side of the master cylinder for clean, space-saving installation.
- Self-Adjusting Valve — Automatically regulates rear brake pressure to prevent lockup during forward weight transfer.
- Universal Fit — Compatible with a wide range of GM A-body and F-body classics from the 1960s–70s.
- Complete Kit — Includes all necessary components: valve, lines, bracket, and bolts for fast setup.
- Disc-Disc Configuration — Optimized for vehicles with disc brakes on all four wheels.
Who is For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 for?
This kit is ideal for DIY restorers and hot rod builders upgrading older GM platforms to modern disc brakes. It’s especially useful for muscle car enthusiasts working on Chevelles, Camaros, Firebirds, Novas, and similar models from 1964–1974. The plug-and-play design suits intermediate-level mechanics seeking a reliable, OEM-style solution without custom plumbing.
How does For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 compare?
Compared to generic proportioning valves, this kit offers a tailored fit for GM master cylinders with minimal modification. Unlike basic valves requiring custom line bending, it includes factory-matched pre-bent lines and mounting hardware. It outperforms universal kits lacking side-mount brackets, providing a cleaner, more secure installation. While not vehicle-specific, its compatibility with popular GM platforms makes it a smarter choice than piecemeal solutions for classic car brake upgrades.
Best use cases
- →1967 Camaro disc brake conversion
- →Chevelle brake system upgrade
- →Classic GM muscle car restoration
- →Firebird rear brake pressure tuning
- →Hot rod with front/rear disc setup
Is For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 right for you?
This kit suits DIYers with intermediate mechanical skills upgrading classic GM vehicles to four-wheel disc brakes. Ideal for restorers seeking a reliable, pre-assembled solution. If your master cylinder has 1/2 or 9/16 ports and you need balanced braking, this kit delivers. For fully custom setups, consider adjustable proportioning valves.
How it compares: Compared to basic proportioning valves, this kit includes pre-bent lines and a mounting bracket, reducing fabrication. It's more complete than standalone valves but less customizable than adjustable units. Ideal for classic GM builds where fit and reliability matter most.
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What does a proportioning valve do in a disc brake system?
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A proportioning valve reduces hydraulic pressure to the rear brakes during hard stops, preventing lockup as weight shifts forward. This improves control and stopping distance, especially in vehicles converted to disc brakes.
Does this kit fit my 1970 Chevelle with disc brakes?
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Yes, this kit is designed for universal fitment on classic GM A-body cars like the 1964–1972 Chevelle. It works with disc-disc setups and mounts to the side of the master cylinder with included hardware.
How do I install the side-mount bracket on my master cylinder?
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The bracket attaches to the side of the master cylinder using included bolts. Ensure clearance and secure fit before connecting brake lines. No welding or modifications are typically required.
Is the proportioning valve pre-adjusted or adjustable?
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This is a self-adjusting proportioning valve that automatically regulates rear brake pressure. It does not require manual tuning, making it ideal for standard disc brake conversions.
Can I use this kit for a custom hot rod brake setup?
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Yes, this kit works well in custom builds with GM-style master cylinders and four-wheel disc brakes. The pre-bent lines and bracket simplify plumbing in tight engine bays.
How much does For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 cost?
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For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 is $54.63 at Lab Work Auto. Prices may change — click through to Lab Work Auto for the latest.
Is For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 in stock at Lab Work Auto?
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Yes, For GMC Proportioning Valve Kit Disc Disc Side Mounting Bracket Lines PV4 is currently in stock at Lab Work Auto.
Specifications
- SKU
- F8-012920