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8 in Dual Gold Offset Firewall Booster & Master Cylinder, 1955-64 Chevy Full Size

CPP high-performance automotive parts for classic cars
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Part #
5561BB24-OE-8D
In Stock
$439.00
1955-64 Chevy Full Size, 8 in Yellow Zinc Dual Diaphragm Offset Firewall Brake Booster & 1.125 in Bore Cast Iron Master Cylinder and Proportioning Valve, works for 2 and 4 Wheel Disc
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Prop 65 warning
The CPP Complete Offset Power Brake Booster Kit (Part Number 5561BB24-OE-8D) fits 55-64 Chevy Full Size. Features an 8" dual gold plated booster. Includes master cylinder and proportioning valve combo. Offset 1.5" to driver's side and 2" up. Compatible with 2 and 4 wheel disc systems.
More Information
Product Name 8 in Dual Gold Offset Firewall Booster & Master Cylinder, 1955-64 Chevy Full Size SKU 5561BB24-OE-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
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Customer Questions
56 Chevy belair with bbc 454. Will this offset booster clear the valve covers.
Unfortunately I cannot answer your question due to variations of valve covers, but I can say that our offset bracket moves the booster 2” toward the fender.
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To clarify, this unit will work with a disc front and drum rear combination.
Hi Arthur, yes this kit will work with disc/drum. 
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5561BB instructions
CPBK Bleeder Kit Instructions
Master Cylinder Instructions
PVK instructions

This kit includes:

  1. Caliper Color

  2. P/N: 64031

    • Description: Power Booster Firewall Boot
    • Quantity: 1
  3. Fixed

  4. P/N: 5564BB-O

    • Description: Offset Brake Booster Brackets
    • Quantity: 1

  5. P/N: 8DSRB

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

  6. P/N: PVKS-A0

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

  7. 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

  8. P/N: CPP-BK

    • Description: Bleeder Kit
    • Quantity: 1

  9. P/N: TECH

    • Description: Brake Trouble Shooting Guide
    • Quantity: 1
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Product Takes 7 Days to Ship
Part # 5561BB24-OE-8DC
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