Sweeting Performance Hydraulic Power Brake System for 1964-1972 Camaro Chevelle El Camino Firebird GTO Monte Carlo Skylark Cutlass with Bosch Hydro-Boost® Brake Booster
Product Description
(for 70-81 Camaro/Firebird use part # HBGMCA7081)
Hydro-Boost Brake System Overview
The Sweeting Performance Hydraulic Power Brake System for 1964–1972 Camaro, Chevelle, El Camino, Firebird, GTO, Monte Carlo, Skylark, and Cutlass uses a Bosch Hydro-Boost® brake booster to deliver powerful, consistent braking without relying on engine vacuum.
Note: For 1970–1981 Camaro and Firebird applications, use part number HBGMCA7081.
Use the drop-down menus to select unit finish, master cylinder, and hydraulic hose options. The information below explains each option in detail and helps you configure the correct system for your vehicle.
What Is a Hydro-Boost Brake System?
Most 5-lug and larger vehicles produce over 1,000 PSI in the power steering system. A Hydro-Boost brake booster taps into this hydraulic pressure rather than relying on engine vacuum.
Vacuum is often reduced by large camshafts, performance engine builds, forced induction, or diesel engines. Hydro-Boost systems provide stronger and more consistent braking regardless of engine vacuum levels.
Unlike electric vacuum pumps, Hydro-Boost systems are belt-driven through the power steering pump, making them quieter, more reliable, and capable of sustained braking in traffic and heavy-use conditions.
Hydro-Boost Performance Benefits
- Stronger braking assist than vacuum boosters
- Consistent pedal feel in traffic and towing conditions
- Ideal for heavy vehicles, large tires, and performance engines
- Does not depend on engine vacuum
The Hydro-Boost unit is compact and installs in the same location as a vacuum booster. An integrated accumulator stores pressure to provide limited braking and steering assist even if the engine stalls.
Condition Options
The Hydro-Boost unit is mechanically simple and typically requires only seal replacement every 100,000–200,000 miles.
- New: Recommended for conversions or direct replacement
- Service/Rebuild: Available for original or previously purchased units
If you have an existing Hydro-Boost that requires service, contact us for pricing and instructions.
Unit Finish Options
Hydro-Boost units are supplied with a durable black painted finish as standard.
- Black Paint (Standard)
- Powder Coat (smoother casting appearance)
- Chrome or Custom Finish (longer lead time)
Custom finishes require complete disassembly and additional preparation.
Hydraulic Hose and Fitting Options
The Hydro-Boost system integrates into the high-pressure power steering circuit, requiring properly rated hoses and fittings.
Available Hose Kits
- 2 Stainless Braid + 2 Rubber Hose Kit
- 4 Rubber Hose Kit
- 4 Stainless Braid Hose Kit
All options are pressure-rated for power steering systems. Stainless braid offers a performance appearance and heat resistance, while rubber hose offers easier assembly and a more factory appearance.
Hoses are supplied extra-long and cut-to-fit. Pre-crimping is available upon request.
Power Steering Pump and Steering Box Information
If your vehicle has non-stock components such as engine swaps, aftermarket pumps, rack-and-pinion conversions, or accessory drive changes, note these modifications during checkout.
Proper fitting selection depends on pump and steering gear configuration.
Master Cylinder Selection
The Hydro-Boost provides significantly more assist than vacuum boosters, allowing the use of larger bore master cylinders for improved pressure and fluid volume.
Recommended Bore Sizes
- Manual brakes: 7/8" – 15/16"
- Small vacuum booster: 1"
- Large vacuum booster: 1-1/8"
- Hydro-Boost: 1-1/8"
Proper bore selection improves pedal feel, reduces pedal travel, and increases braking consistency.
If reusing an existing master cylinder, note bore size and mounting details during checkout.
Proportioning Valve Considerations
A proportioning valve change is not required for Hydro-Boost conversion alone. However, vehicles converting from rear drum to rear disc brakes require a disc/disc proportioning valve.
Adjustable proportioning valves are recommended for performance and tuning flexibility.
Mounting Options
Most Hydro-Boost systems mount in the factory brake booster location on the firewall or frame.
- Replacing Stock Hydro-Boost
- Converting from Vacuum Booster
- Hydraulic Remote Mount (space-limited applications)
Remote mounting solutions are available for vehicles with extreme engine bay constraints.
Shipping and Lead Time
Please refer to the Company Info page for current lead times and production schedules.
Frequently Asked Questions
Will this system work with engine swaps?
Yes. Please provide pump and steering gear details during checkout to ensure correct fittings.
Can I reuse my existing master cylinder?
In many cases, yes. Bore size, mounting pattern, and pushrod depth must be compatible.
Does Hydro-Boost require special maintenance?
Routine power steering fluid maintenance is sufficient. Seal replacement is typically required after extended mileage.
Accessories
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