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Proportioning Valves and Accessories

Classic Performance Products offers a range of brake proportioning valves and accessories, ensuring the correct brake fluid pressure for your vehicle’s front and rear wheels. Available in both fixed and adjustable options, these valves are essential for drum-to-disc brake upgrades. Features include a warning light switch for detecting pressure loss and the ability to be wired into your system. Our valves handle four key functions: ... proportioning pressure, a 10 psi residual check valve, a metering valve for the rear brakes, and a brake warning light. Ideal for maintaining balanced brake performance and preventing rear drum brakes from locking up too easily, these valves are a crucial component for your classic car or truck's braking system.

Why Choose Classic Performance for Your Proportioning Valves and Accessories
We are passionate classic and sports car enthusiasts with three decades of industry experience and rigorously test and utilize every product we offer. Whether enduring tough track days or clocking thousands of miles on the street, you can trust that professionals have thoroughly vetted every part we carry.

Our knowledgeable support team is always ready to assist you with any questions or concerns about our Proportioning Valves and Accessories. We are here to ensure you have a seamless and satisfying experience finding the perfect solution for your classic vehicle's braking system.

Elevate your classic driving experience with a Proportioning Valve Kit from ClassicPerform.com. Count on us to provide a comprehensive solution that meets and surpasses your expectations. Enhance the safety and performance of your classic vehicle's braking system confidently and enjoy the road like never before. Trust Classic Performance Parts for all your Proportioning Valves and Accessories needs.

Proportioning Valve W/Bracket & Lines Black, Driver's Side, Firewall Mount, 1/2x20 & 9/16x18 Ports
2 or 4 Wheel Disc, Black Aluminum, Driver's Side, Firewall Mount, Black Bracket, 1/2x20 & 9/16x18 Master Ports
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In Stock

Part # PVKS-BL1

0%

$99.00
Rear Relief Proportioning Valve, Aluminum
Aluminum Finish
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In Stock

Part # PV-24NA

0%

$25.00
Proportioning Valve W/Bracket & Lines Chrome Undermount, Frame Mount, 1/2x20 & 9/16x18 Ports
2 or 4 Wheel Disc, Chrome Aluminum, Undermount, Frame Mount, Gold Zinc Bracket, 1/2x20 & 9/16x18 Master Ports
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In Stock

Part # PVKU-APVDB-C

0%

$135.00
Prop & Block W/Bracket & Lines Black Undermount, Frame Mount, 1/2x20 & 9/16x18 Ports
2 or 4 Wheel Disc, Black Aluminum, Undermount, Frame Mount, Black Bracket, 1/2x20 & 9/16x18 Master Ports
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In Stock

Part # PVKU-BL1

0%

$115.00
Chrome Aluminum Proportioning Valve for 2 & 4 Wheel Disc
1/2x20 to front M/C, 7/16x24 to Rear M/C, 3/8x24 Out to Front (2 ports), 9/16x18 Out to Rear Port
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In Stock

Part # PV-24AHC

0%

$89.00
Proportioning Valve W/Bracket & Lines Chrome Undermount, Frame Mount,, 1/2x20 & 9/16x18 Ports
2 or 4 Wheel Disc, Chrome Aluminum, Undermount, Frame Mount, Chrome Bracket, 1/2x20 & 9/16x18 Master Ports
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In Stock

Part # PVKU-C0

0%

$135.00
Proportioning Valve W/Bracket & Lines Brass, Undermount, Frame Mount, 1/2x20 & 9/16x18 Ports
2 or 4 Wheel Disc, Brass, Undermount, Frame Mount, Gold Zinc Bracket, 1/2x20 & 9/16x18 Master Ports
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In Stock

Part # PVKU-B0

0%

$115.00
Proportioning Valve Bracket & Lines, Drivers Side for Firewall, 9/16 x 18 rear and 1/2 x 20 Front, Chrome Plated
Driver's Side for Firewall, Master Cylinder Ports are 9/16 x 18 rear and 1/2 x 20 Front, Chrome Plated, for CPP's PV- Style Valves
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In Stock

Part # PVBLK-SC

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$25.00
Proportioning Valve Lines to the Cylinder Steel Lines, 3/8 x 24 rear and 3/8 x 24 Front
Driver's Side Firewall for CPP's APV-DB & APV-DBC Valves, Steel Lines, Master Cylinder Ports are 3/8 x 24 rear and 3/8 x 24 Front
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In Stock

Part # PVL-APVDB316

0%

$30.00
Aluminum Adjustable Proportioning Valve 2 & 4 Wheel Disc
1/8 NPT Inlet & Outlet
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In Stock

Part # APV

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$49.00
Baer Brake Hardlines to Remaster Prop Valve
Brake Hard Line - 3/16 in Diameter - 3/8-24 in Inverted Flare. To remaster Proportioning Valve
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In Stock

Part # 6801319

0%

$99.00
Chrome Aluminum Adjustable Proportioning Valve 2 & 4 Wheel Disc
1/8 NPT Inlet & Outlet
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In Stock

Part # APV-C

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$69.00
Proportioning Valve Adapter Fitting Kit - Set of 3
9/16-18 Inverted Male To 3/8-24, and 7/16-24, and 1/2-20 Inverted Female
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In Stock

Part # CP2091

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$20.00
Adjustable Proportioning Valve Switch and Wire
Switch and Wire
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In Stock

Part # APV-SW

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$19.00
All Proportioning Valve Adapter Fittings to Convert PV Series to -AN 3 male - Set 5
Coverts PV Series Valves to -AN 3 male
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In Stock

Part # CP2130

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$59.00
Black Aluminum Adjustable Proportioning Valve For Dual Master Cylinders 2 & 4 Wheel Disc
2 Inlets, 3 outlets, all 3/8 x 24 Ports. w/ 1/8 NPT hole for use with a Brake Light Switch
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In Stock

Part # APV-DB

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$95.00
Chrome Aluminum Adjustable Proportioning Valve For Dual Master Cylinders 2 & 4 Wheel Disc
2 Inlets, 3 outlets, all 3/8 x 24 Ports. w/ 1/8 NPT hole for use with a Brake Light Switch
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In Stock

Part # APV-DB-C

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$105.00
Wilwood Proportioning Valve, Right Hand
P-Valve, Combo Proportioning w/Mounting Bracket, R/H
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In Stock

Part # 260-15048

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$150.00
Wilwood Proportioning Valve, Compact-Assembly Knob Type
Valve, Proportioning, Compact-Assembly Knob Type
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In Stock

Part # 260-8419

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$54.00
Wilwood Proportioning Valve Bracket Kit
Includes, Bracket, Hardware and Lines
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In Stock

Part # 220-15047

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$89.00
Wilwood Integral Reservoir Compact Master Cylinder 3/4in Assembly
M/C, Girling Style, 3/4in. Assembly
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In Stock

Part # 260-1304

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$86.00
Proportioning Valve and Master Cylinder Adapter Fitting Kit - Set of 3
EZ Return Fitting. AN6 Male x 1/4" NPT
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In Stock

Part # 45045

0%

$20.00
Wilwood Proportioning Valve, Compact-Assembly Knob Type, In/Out
Valve, Proportioning, Compact-Assembly Knob Type, 3/8-24IF, In & Out
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In Stock

Part # 260-10922

0%

$54.00
Adjustable Proportioning Valve Bracket, Black Zinc
Black Zinc Finish, used with APV-DB
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In Stock

Part # 11499B

0%

$15.00
Wilwood Aluminum Combination Proportioning Valve
Valve, Combination, Aluminum, Assembly
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In Stock

Part # 260-11322

0%

$127.00
Wilwood Proportioning Valve, Remote Tandem, Left Hand
P-Valve, Combo Proportioning w/Mounting Bracket, Remote Tandem, L/H
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In Stock

Part # 260-14248

0%

$150.00
Wilwood Proportioning Valve, Left Hand
P-Valve, Combo Proportioning w/Mounting Bracket, Left Hand
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In Stock

Part # 260-13190

0%

$150.00
Wilwood Proportioning Valve, Combo Assembly
Valve, Proportioning, Combo Assembly 3/8-24 IF, Knob Type
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In Stock

Part # 260-11179

0%

$115.00
Wilwood Proportioning Valve, Short Tandem, Right Hand
P-Valve, Combo Proportioning w/Mounting Bracket, Short Tandem, R/H
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In Stock

Part # 260-15667

0%

$150.00
Proportioning Valve Bracket Assembly
Prop Valve Bracket Assembly
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In Stock

Part # 6801276

0%

$114.95

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Frequently Asked Questions

Does a 4 wheel disc need a different proportioning valve?

Not when you buy one of our CPP proportioning valves. Our proportioning valve will work with both disc/drum or disc/disc applications.

What does a brake proportioning valve do?

A brake proportioning valve regulates the brake fluid pressure between the front and rear brakes, ensuring balanced braking power.

What size fitting is the back of the proportioning valve?

The fitting size is 9/16-18" but we sell a kit that would accommodate any popular size adapter (part number CP2091) which includes 3/8-24", 7/16-24", and 1/2-20".

Do I need a proportioning valve when upgrading from drum to disc?

Yes! A proportioning valve is needed to ensure the proper amount of brake fluid pressure is going to the front and rear wheels.

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