JEGS
Power Brake Booster Conversion Kit for 1964-1974 GM A/F/X-Body [Disc/Drum]
555-631430
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| Price |
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GM Car, Disc Front & Drum Rear
JEGS 555-631430 Power Brake Booster Conversion Kit Features:
- Transform your manual brake system to a power-assisted unit
- Designed for front disc / rear drum brake systems
- Fits GM A, F, and X-body cars such as 1968-1972 Chevelle, malibu, Monte Carlo, Tempest, lemans, GTO, Grand Am, Grand Prix, Cutlass, Skylark, Century, Regal, 1967-1969 Camaro, Firebird, and Nova
- Includes: 11 in. o.e.m. zinc power brake booster, 1 “ bore cast iron master cylinder, left mount proportioning valve kit, brake light warning switch, and mounting bracket
- Must have kit to improve brake performance
JEGS 555-631430 Power Brake Booster Conversion Kit Includes:
- Designed for Disc Front & Drum Rear Applications
- 11 in. O.E.M. Single Delco Moraine Stamped Zinc Power Brake Booster
- 1 in. Bore Cast Iron Master Cylinder
- Left/Driver Side Mount Brass Proportioning Valve Kit with Mounting Bracket and (2) 3/8 in.-24 Ports for Front Brakes & (1) 9/16 in.-18 Ports for Rear Brakes
- Brake Light Warning Switch
- Angle Firewall Mounting Bracket
- Pedal Rod Extension & Clevis
Application Fitment:
- 1964-1972 GM A-Body, Buick Skylark, Chevrolet Chevelle, Pontiac GTO
- 1967-1969 GM F-Body, Chevrolet Camaro, Pontiac Firebird
- 1968-1974 GM X-Body, Chevy Nova
Specifications:
Part Type
Product Line
Booster Mounting Bracket Included
Yes
Bowl Design
Dual
Brake Booster Diameter
11 in (279.4 mm)
Brake Booster Finish
Gold zinc plated
Brake Booster Included
Yes
Brake Booster Material
Steel
Brake Booster Type
Vacuum diaphragm
Brake Pedal Rod Extension Included
Yes
Front Brake Type
Disc
Master Cylinder Bore Size
1 in (25.4 mm)
Master Cylinder Cap Included
Yes
Master Cylinder Finish
Natural
Master Cylinder Included
Yes
Master Cylinder Material
Cast iron
Mounting Hardware Included
Yes
Mounting Hole Quantity
4 holes
Package Depth
13.90
Package Height
16.00
Package Width
15.70
Part Category
Replacement Parts
Part Fitment
Direct Fit
Quantity
Sold as an Assembly
Rear Brake Type
Drum
Reservoir Included
Yes
Reservoir Material
Cast iron
Shipping Weight
25.31
Vendor Part Number
GM-224
631430 is rated
out of
5 by
18.
Rated 5 out of
5
by
JeffB66 from
B1GB1U66 power disc brakes and LS power.
Awesome upgrade for 66 chevelle. I added front disc brake and the booster upgrade topped it off.
Date published: 2023-10-26
Rated 5 out of
5
by
Craigb from
Perfect fit
Excellent fit, works perfectly. Instructions could be more detailed
Date published: 2022-10-25
Rated 5 out of
5
by
SGBARRACUDA from
Worked perfect after a slight modification
I used this set up in a 56 Chevy truck that had a more modern brake pedal in it. I had to alter the mounting bracket in order for the booster to mount in a vertical position rather than leaned back like the mount would have put it. Other than that, it worked out perfect.
Date published: 2020-04-05
Rated 4 out of
5
by
Hammond from
Heavy duty
Reason for 4 stars: not at all the products fault. I bought the kit with 11" booster... pretty sure I needed 8". But it's too soon in my build to really know that. Had I actually paid attention to what I needed, 5 stars easy.
Also! Packaging was awesome! Came home from work to a giant box. It was a box inside of a box inside of another box! 3 boxes. My 4 year old loved them!
Date published: 2020-01-08
Rated 2 out of
5
by
MD Auto Instructor from
Fitment not good...
Converting manual drum to disc/drum on a 64 Buick Special. Booster hits the inner fenderwell, so I had to "clearance" the fenderwell with a ball peen. The prop valve also hits the fenderwell and the horn relay. Another "clearancing" and had to relocate the horn relay. A lot of work on my particular vehicle that I didn't want or expect. I also signed up for the Jegs emails to get a discount, and it took 2 days for an email to hit my inbox. I had already ordered by then.
Lastly, it is a fantastic looking product!
Date published: 2023-10-22
Would this fit a 1974 Buick century
The Jegs 555-631430 booster kit does not fit a '74 Century.
Date published: 2024-03-29
Would this fit a 77 Oldsmobile salon
The Jegs 555-631430 booster does not fit a '77 Olds.
Date published: 2024-03-13
Will this fit a 1966 Pontiac Catalina?
The Jegs 555-631430 booster does not fit a '66 Catalina.
Date published: 2024-02-08
Is the proportioning valve a combination proportioning/hold off style or will I need a separate brake hold off valve?
The Jegs 555-631430 is a proportioning valve only.
Date published: 2024-01-31
Will this fit a 64 impala.
The Jegs 555-631430 booster kit does not fit a '64 Impala.
Date published: 2024-01-22
Will this booster kit fit a 68 Impala
The Jegs 555-631430 booster does not fit a '68 Impala.
Date published: 2024-01-19
Will this kit fit on a 1979 Chevy Nova Ralley with disc front and drum rear. 5.7 engine
The Jegs 555-631430 booster kit does not fit a '79 Nova.
Date published: 2023-11-15
Will it fit a 65 wildcat
The Jegs 555-631430 booster kit does not fit a '65 Wildcat.
Date published: 2023-10-20
Eliminator Single-Adjustable Front Coil-Over Conversion Kit 1964-1967 Chevelle 1967-1969 Camaro/Firebird 1970-1972 Monte Carlo w/ Small Block 4" Stroke Includes: (2) Shocks (2) Springs (2) Adjuster Nuts
JEGS 631232 Power Brake Assembly Features:Perfect for Street Rods that don't have Room for a Firewall Mounted Brake SystemThis Unit is for Disc/Drum and Drum/Drum applications7 in. Dual Diaphragm Power Brake Booster with Zinc Finish1 in. Bore Cast Iron Dual ...
Some parts are not legal for use in California or other states with similar laws / regulations
Motor Vehicles
WARNING: Motor vehicles contain fuel, oils and fluids, battery posts, terminals and related accessories which contain lead and lead compounds and other chemicals known to the State of California to cause cancer, birth defects and other reproductive harm. These chemicals are found in vehicles, vehicle parts and accessories, both new and as replacements. When being serviced, these vehicles generate used oil, waste fluids, grease, fumes and particulates, all known to the State of California to cause cancer, birth defects, and reproductive harm.
Tools:
WARNING: Some dust created by power sanding, sawing, grinding, drilling, and other construction activities contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Some examples of these chemicals are: lead from lead-based paints, crystalline silica from bricks and cement and other masonry products, and arsenic and chromium from chemically treated lumber. Your risk from exposure to these chemicals varies, depending on how often you do this type of work. To reduce your exposure, work in a well-ventilated area and with approved safety equipment, such as dust masks that are specially designed to filter out microscopic particles.
Electrical Cords
WARNING: The wires of these products contain chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. Wash hands after handling.