JEGS
GM 10 & 12 Bolt Rear Disc Brake Conversion Kit for Select 1955-1968 GM Full Size Cars [Premium Kit w/E-brake & Raw Calipers]
555-631801
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Standard Shock Configuration
JEGS 555-631801 GM 10 & 12 Bolt Rear Disc Brake Conversion Kit
The JEGS 631801 Premium rear disc brake conversion kit has everything you need to convert the rear drum brakes to a disc brake system on a 1955-1968 Full-Size GM Car. This Kit will add modern safety to your classic car, drastically improve the stopping distance, and gain your confidence while driving. This upgrade is intended for street-driven vehicles while maintaining the emergency brake and utilizing some stock components.
JEGS 555-631801 GM 10 & 12 Bolt Rear Disc Brake Conversion Kit Includes:
- (2) Hubless 10 Hole, 11 in. Drilled & Slotted Rotors (Dual Lug Pattern: 5 x 4.500 in. and 5 x 4.750 in.)
- (1 Set) Large GM Raw Calipers w/Self Adjusting E-Brake and D54 Pads (1979 Cadillac El Dorado)
- (2) Caliper Brackets & Spacers
- (2) 10 mm Braided Stainless Steel Brake Hoses
- (2) 10 mm Banjo Bolts
- (4) 10 mm Copper Washers
- (6) 3/8 -24 x 5 in. UHL Bolts
- (6) 3/8 -24 Lock Nuts
- (6) 3/8 in. Flat Washers
- (2) Brake Hose Clips
- (2) Brake Hose Mounting Tabs
- (1 box) Left Driver Side & Right Passenger Side Caliper Brackets
- (6) Shims
- (2) Square Backing Plates/Axle Flange
- (2) E-Brake Cables, Backing Plate to Equalizer
- (1) E-Brake Cable Extension and attaching Clips
- Designed for axles with a 3.375 in. (3 3/8 in.) flange [center-to-center spread of the flange's top two bolt holes]
JEGS 555-631801 GM 10 & 12 Bolt Rear Disc Brake Conversion Kit Notes:
- Does not fit axles with a 3 1/8 in. flange bolt pattern [center-to-center spread of the flange's top two bolt holes]
- Does not fit S-10 Chassis or truck frames
- Maximum diameter of 6.110 in. to fit rotor hat.
- Rotor Center = 2 3/4 in. - Rotor Hat Section Inside Diameter = 6 3/16 in.
- You will need to modify your axles if they will not fit inside the rotor hat and you will need to modify the rotor if the center hole is too small for your axles.
- 0.050 x 45 Degree Chamfer
- 2.786 in. max register axle
How To Measure Rear Axle Hub Flange & Register Dimensions
- The installation of disc brakes will require the use of 15 in. wheels
- This brake conversion kit will not work with 14 in. wheels
- Does Not Fit S-10 Chassis or Truck Frames
- This kit Requires a disc/disc proportioning valve. We recommend JEGS 555-63025 sold separately.
- We recommend a 1.125 in. large bore master cylinder when adding disc brakes. We recommend JEGS 555-631200 sold separately.
Emergency Brake Note: The emergency brake cables provided in the kit will fit the 1955-1964 Full-Size Chevrolet. Any other application will require the customer to modify the included cables to work with their application. The intermediate cable, center-pull, and cable couplers may not be necessary on 1958-1964 cars.
Specifications:
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.