1982–1987 Buick Regal 9" Dual Power Brake Booster, Wilwood Master Cylinder & Disc/Disc Proportioning Valve – Black Out Edition

Upgrade and restore the braking performance of your 1982–1987 Buick Regal with this complete brand-new "Black Out" Power Brake Booster, Wilwood Master Cylinder & Disc/Disc Proportioning Valve Package.

Designed specifically for G-Body Buick Regals, this complete brake upgrade combines a 9" dual-diaphragm power brake booster, a genuine Wilwood 260-8556-BK 1.125" bore master cylinder, and a matching black-out GM-style disc/disc proportioning valve into one convenient package.

The 9" dual-diaphragm booster provides strong, consistent vacuum-assisted braking while helping reduce pedal effort. The Wilwood 260-8556-BK master cylinder features a 1.125" bore and provides the hydraulic pressure needed for responsive brake operation. The matching disc/disc proportioning valve is designed for vehicles equipped with four-wheel disc brakes and helps properly manage hydraulic brake pressure between the front and rear circuits.

Whether you're restoring a classic Regal, replacing worn original components, or upgrading the braking system on a street-driven G-Body, this package provides the major components needed to refresh your power brake system with a clean, coordinated Black Out appearance.

Complete Kit Includes:

• Brand-New 9" Dual-Diaphragm Power Brake Booster
• Wilwood 260-8556-BK 1.125" Bore Master Cylinder
• Black-Out GM-Style Disc/Disc Proportioning Valve

9" Dual Power Brake Booster Features:

• Brand-new construction — not remanufactured
• 9" dual-diaphragm design for strong, consistent brake assist
• Helps reduce brake pedal effort
• Durable steel construction with corrosion-resistant finish
• OE-style fit, function, and appearance
• Designed for factory-style vacuum-assisted braking systems
• Direct replacement for applications using Cardone 54-71243 style boosters
• Ideal for restoration, replacement, and brake system upgrades

Genuine Wilwood 260-8556-BK Master Cylinder:

• Genuine Wilwood master cylinder
• Wilwood Part Number 260-8556-BK
• 1.125" bore
• Black finish
• Compact oval-style performance design
• Designed for power brake applications
• Provides responsive hydraulic brake operation
• High-quality Wilwood construction
• Black finish complements the booster and proportioning valve
• Excellent choice for G-Body restoration and performance brake upgrades

Important: The master cylinder is the only Wilwood component in this package. The 9" power brake booster and disc/disc proportioning valve are brand-new aftermarket components selected to complement the Wilwood master cylinder and G-Body application.

Matching Black-Out Disc/Disc Proportioning Valve:

• Brand-new GM-style proportioning valve
• Designed for four-wheel disc brake systems
• Helps properly distribute and control hydraulic brake pressure
• Designed for front disc / rear disc applications
• Black-out finish provides a clean, understated appearance
• Matching appearance complements the black booster and Wilwood master cylinder
• Ideal for classic GM and G-Body restoration and brake upgrade projects

Features & Benefits:

• Complete power brake package — booster, Wilwood master cylinder, and proportioning valve
• Designed for 1982–1987 Buick Regal
• Genuine Wilwood 260-8556-BK 1.125" bore master cylinder
• 9" dual-diaphragm booster provides strong braking assist
• Disc/disc proportioning valve is designed for four-wheel disc brake systems
• Brand-new components throughout — no remanufactured parts
• Coordinated Black Out appearance
• Excellent choice for restoration, replacement, or brake system upgrades
• Helps refresh pedal feel and vacuum-assisted braking performance
• Convenient way to replace several major brake components at once

Perfect For:

• 1982–1987 Buick Regal
• G-Body restoration projects
• G-Body four-wheel disc brake conversions
• Replacing worn, weak, or aging brake components
• Upgrading an original power brake system
• Street cars, weekend cruisers, and show-quality builds
• Projects requiring a new booster, master cylinder, and disc/disc proportioning valve
• G-Body builds using a performance-oriented 1.125" bore Wilwood master cylinder

Restore Your G-Body's Braking Performance

Don't settle for a worn-out booster or aging original brake components. Replace the major components of your power brake system with this brand-new 9" Dual Power Brake Booster, Genuine Wilwood 260-8556-BK 1.125" Bore Master Cylinder, and Matching Black-Out Disc/Disc Proportioning Valve Package.

The combination of strong vacuum-assisted braking, a genuine Wilwood 1.125" bore master cylinder, and a matching disc/disc proportioning valve provides an excellent foundation for refreshing and upgrading the braking system on your 1982–1987 Buick Regal.

Brand-new components. Genuine Wilwood master cylinder. Four-wheel disc compatibility. Classic G-Body styling. A complete brake-system refresh in one package.