SSBC-USA 9-inch brake booster and master cylinder combo for A129-4 kit, showing the brake booster and master cylinder components.

Booster/Master Brake Cylinder Combo, 9", For A129-4 Kit – A28138

SKU- A28138

Regular price $272.00
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Shipping calculated at checkout.

9-Inch Booster/Master Cylinder Combo for A129-4 – A28138

SSBC-USA A28138 combines a 9-inch brake booster with a 1-1/8-inch bore master cylinder for compatible A129-4 and select power-brake Corvette-style applications where specified.

Product Details

  • Part number: A28138
  • 9-inch brake booster
  • 1-1/8-inch master-cylinder bore
  • Compatible replacement application includes select A129-4 systems
  • For compatible power-brake applications where specified

Brake System & Fitment

Master-cylinder bore and booster configuration must match the complete brake system. Confirm kit number, pedal and firewall configuration, pushrod requirements, 1-1/8-inch bore requirement and available clearance before ordering.

Bench Bleeding Required

Bench bleed the master cylinder in a vise before installation. Use clean brake fluid specified for the application, keep the return hoses submerged in the reservoir, and slowly stroke the piston until air bubbles are eliminated. Do not allow the reservoir to run dry, and bleed the complete brake system after installation.

Manufacturing Information

The brake booster and master-cylinder components in this assembly are sourced by SSBC-USA and are not manufactured in-house at our Elma, New York facility. Contact Customer Service for confirmed country-of-origin information.

✔ Fitment Confidence: Confirm kit, pedal, firewall, pushrod, bore requirements and brake-system compatibility before ordering. Call (716) 775-6700 if uncertain.

🚚 Shipping: This item ships from our Elma, NY facility. Typical processing time is 5–10 business days, subject to product availability and supplier delays.

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Frequently Asked Questions

How do I confirm this product fits my vehicle or brake system?

Review the fitment information on this page and confirm your year, make, model, drivetrain, wheel clearance, and current brake configuration where applicable. If you are unsure, call SSBC-USA technical support at (716) 775-6700 before ordering.

What is included with this product?

The included components are listed in the product description above. If a component is not specifically listed or you need help identifying what is required for your application, call SSBC-USA at (716) 775-6700.

How long will this product take to ship?

This item is configured to order at our Elma, New York facility. Production and configuration typically take 5–10 business days, although supply constraints can occasionally cause additional delays. Exact shipping cost is calculated at checkout.

Where can I get technical or order support?

Call SSBC-USA at (716) 775-6700 or email orders@ssbc-usa.com. Please include your product or order number when available.