GM 10/12 Bolt Rear Disc Brake Conversion Kit for 1964-1972 GM A-Body [Standard Kit with E-Brake & Black Calipers]

Name: GM 10/12 Bolt Rear Disc Brake Conversion Kit for 1964-1972 GM A-Body [Standard Kit with E-Brake & Black Calipers]
Brand: JEGS
SKU: 555-631787
Price: 467.99 USD
Availability: InStock

^$467⁹⁹$544.99You Save$77.00

Ships on Sep 07, 2026

Lowest Price Guarantee

GM A-Body Cars - Standard Rear Disc Brake Conversion Kit with Plain Rotors

GM Rear Disc Brake Conversion Kit

1964-1972 GM A-Body

Standard Kit

Includes:

11 in. Plain Rotors w/ 5 x 4.750 in. & 5 x 4.500 in. Dual Bolt Patterns
Black Calipers w/built in E-Brake
See Special Note Below

JEGS 555-631787 GM 10 & 12 Bolt Rear Disc Brake Conversion Kit
JEGS 631787 GM 10 & 12 Bolt Rear Axle Disc Brake Conversion Kit for GM A-Body Cars is an easy bolt-on solution for upgrading your GM rear-end to disc brake performance. This kit is designed for GM rear axles with coil springs and shocks that mount on the backside of the axle housing.
JEGS 555-631787 GM 10 & 12 Bolt Rear Disc Brake Conversion Kit Includes:
- (1 Set) Loaded Black Powder Coated Calipers Left/Driver Side and Right/Passenger Side w/Self Adjusting E-Brake, D54 Pads, and Mounting Hardware
- (2) Hubless 10 Hole 11 in. Plain Rotors (Dual Lug Pattern: 5 x 4.500 in. and 5 x 4.750 in.)
- (2) 10 mm Rubber Brake Hoses
- (2) 10 mm Banjo Bolts
- (4) 10 mm Copper Washers
- (6) 3/8 -24 x 50 Bolts
- (6) 3/8 -24 Lock Nuts
- (6) 20 x 10.5 x 2 Washers
- (2) Brake Hose Clips
- (1 box) Left Driver Side & Right Passenger Side Caliper Brackets
- (6) Shims
- (2) Brake Hose Mounting Tabs
- (2) Square Backing Plates/Axle Flange
JEGS 555-631787 GM 10 & 12 Bolt Rear Disc Brake Conversion Kit Notes:
- Will NOT Fit These Applications: Axle Flange is too large to fit into the hat of the rotor. See the dimensions below before ordering.
  - 1964-1965 LeMans, Tempest & GTO
  - 1964-1972 Skylark & GS
  - 1970-1974 LeMans, Tempest, GTO, Cutlass & 442
- Maximum Axle Flange Face Diameter of 6.11 in. with 2.786 in. Maximum Hub Register to fit Rotor Hat.
How To Measure Rear Axle Hub Flange & Register Dimensions
- Fits GM Cars with Both Shocks Mounted Behind the Rear Axle Housing
- 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.

Add Safety, Reliability, and Performance to Your Vehicle with Rear Disc Brakes

JEGS 10 & 12-Bolt GM Rear Disc Brake Conversion Kits combine some of the best features available to make your selection and installation easy. Our brake kits include brackets, flanges, and large GM calipers with pads for small GM (4-bolt) housing ends. GM Rear Disc Brake Kits are available for standard (coil springs with both shocks behind the rear axle) or staggered (leaf springs with one shock forward of and one shock behind the rear axle) set-ups.

Standard Kits Include Factory-style rotors, brake cables (as listed), rubber brake hoses, raw brake calipers, and mounting hardware.

Premium Kits Include Cross-drilled and slotted rotors, brake cables (as listed), braided stainless-steel brake hoses, and a choice of raw, red, or black powder-coated calipers and mounting hardware.

Part TypeBrake Conversion Kit

Product LineJEGS 10 & 12-Bolt GM Rear Disc Brake Conversion Kits

BrandJEGS

Package Height11.0

Package Width14.0

Package Length15.0

Weight26.0 PG

Part CategoryPerformance Parts

Part FitmentDirect Fit

Vendor Part NumberDBK1012B

Package Qty1

Package TypeEA