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8 in Dual Gold Firewall Booster & Master Cylinder, 1964-74 AFX

CPP high-performance automotive parts for classic cars
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Part #
6874BB24-8D
Product Takes 7 Days to Ship
$369.00
1964-72 A-Body 1967-69 F-Body 1968-74 X-Body, 8 in Yellow Zinc Dual Diaphragm Firewall Brake Booster & 1.125 in Bore Master Cylinder and Proportioning Valve, works for 2 and 4 Wheel Disc
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Prop 65 warning
The CPP Complete Power Brake Booster Kit (Part Number 6874BB24-8D) fits 64-72 A-Body, 67-69 F-Body, and 68-74 X-Body. It includes an 8" dual gold-plated booster, master cylinder, and proportioning valve combo. Compatible with 2 and 4 wheel disc systems.
More Information
Product Name 8 in Dual Gold Firewall Booster & Master Cylinder, 1964-74 AFX SKU 6874BB24-8D
Brake Booster Diameter 8 Brake Booster Finish Gold
Brake Booster Type Dual Diaphragm Master Cylinder Bore Size 1.125
Master Cylinder Finish None Master Cylinder Material Cast Iron
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 Brake Booster Mount Type Firewall
Product Type Brake Boosters
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Modern Stopping Power for Classic Builds: Inside the CPP E-Booster Kit

When building or restoring a classic car, performance upgrades usually start with power and handling—but braking should never be an afterthought. Enter the CPP E-Booster, a next-gen braking solution that’s rewriting the rules for muscle cars. Designed for 1964–72 GMC A-Body, 1967–69 F-Body, and 1968–74 X-Body vehicles, this vacuum-free, electric brake booster kit blends OEM-quality tech with aftermarket versatility.

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CPBK Bleeder Kit Instructions
Master Cylinder Instructions
PVK instructions

This kit includes:

  1. Fixed

  2. P/N: 6474BB

    • Description: Power Brake Booster Brackets Yellow Zinc (Pr)
    • Quantity: 1

  3. P/N: 6474BPR

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

  4. P/N: 8DSRB

    • Description: Universal Gold Plated Power Brake Booster, 8in Dual
    • Quantity: 1

  5. P/N: M-C118-LLF

    • Description: Cast Iron Power Master Cylinder for1 1/8in Master with 1/2 x 20 and 9/16 x 18 Ports
    • Quantity: 1

  6. P/N: 64012

    • Description: After Market Vacuum Booster Dust Cover
    • Quantity: 1

  7. P/N: PVKS-B1

    • Description: Proportioning Valve W/Bracket & Lines Brass, 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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