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7 in Dual Black Firewall Booster & 1 in Bore Aluminum Master Cylinder, 1964-74 AFX

Sleek black-finish brake components by CPP
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Part #
MNS6474BB24-7D
Product Takes 7 Days to Ship
$389.00
1964-72 A-Body 1967-69 F-Body 1968-74 X-Body, 7 in Black Dual Diaphragm Firewall Brake Booster with 1 in Bore Aluminum Master Cylinder and Proportioning Valve, works for 2 and 4 Wheel Disc
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Prop 65 warning
Ideal for applications with limited firewall or engine clearance, this Midnite Series kit features a compact 7" dual diaphragm booster. The black powder coated booster is matched with an aluminum master cylinder and aluminum proportioning valve. Fits 1964-72 A-Body, 1967-69 F-Body, and 1968-74 X-Body vehicles and supports both 2 wheel disc and 4 wheel disc brake systems. Installs as a direct bolt in system with no modification required.
More Information
Product Name 7 in Dual Black Firewall Booster & 1 in Bore Aluminum Master Cylinder, 1964-74 AFX SKU MNS6474BB24-7D
Series Midnite Series Bleeder Kit Included Yes
Brake Booster Diameter 7 Brake Booster Finish Black
Brake Booster Type Dual Diaphragm Master Cylinder Bore Size 1
Master Cylinder Finish None Master Cylinder Material Aluminum
Master Cylinder Type CPP Left Side Ports Hardware Included Yes
Works With 2 Wheel Disc Yes Works With 4 Wheel Disc Yes
Works With 4 Wheel Drum No Proportioning Valve Type Side Mount Left Hand
Proportioning Valve Included Yes Brake Booster Kit Type Complete Booster Kits
Master Cylinder Included Yes Brake Pedal Extension Rod Included Yes
Warranty Yes Prop65 Yes
Brand CPP MidNite Series Brake Booster Mount Type Firewall
Product Type Brake Boosters
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CPP Power Brake Kit Install Yields Plenty of Whoa Power

Many classic vehicles, including Tri-Five Chevys and pre-1967 cars and trucks, came equipped with single-reservoir master cylinders. While these served well for decades, a failure in any brake hose, wheel cylinder, or line could evacuate the entire system, compromising safety. Upgrading to a dual-reservoir, power-brake setup not only adds redundancy but also reduces pedal effort—an especially welcome change for weekend cruisers and street rods alike.

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CPBK Bleeder Kit Instructions
Master Cylinder Instructions
PVK instructions

This kit includes:

  1. Fixed

  2. P/N: 64012

    • Description: Firewall Booster Boot
    • Quantity: 1

  3. P/N: 6474BB-B

    • Description: Black Brake Booster Brackets for CPPs Midnite Series Boosters
    • Quantity: 1

  4. P/N: 6474BPR

    • Description: 4.875in Threaded Push Rod Male 3/8-24x3.0in Thread Female 3/8-24x1.25in Thread
    • Quantity: 1

  5. P/N: 7DSRB-BL

    • Description: Universal Black Power Brake Booster, 7in Dual
    • Quantity: 1

  6. P/N: M-C100-APBLF

    • Description: 1in Bore Left Side Port Aluminum Power Master Cylinder W/Black Lid
    • Quantity: 1

  7. P/N: PVKS-A1

    • Description: Proportioning Valve W/Bracket & Lines Driver's Side, Firewall Mount, 1/2x20 & 9/16x18 Ports
    • Quantity: 1

  8. P/N: H-BBK

    • Description: Basic Booster Install Kit
    • Quantity: 1

  9. P/N: TECH

    • Description: Brake Trouble Shooting Guide
    • Quantity: 1
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