GM 10 & 12 Bolt Bolt-On Rear Disc Brake Kit w/ E-Brake
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If you dont want to spend an arm and a leg on a rear disc brake kit and still have to weld the bracket on, weve got you covered. This complete kit includes two bolt-on caliper brackets, two 11-1/4" vented rotors, two GM emergency brake style calipers, brake pads and hardware.
- Rotors have both 5 on 4-1/2" and 5 on 4-3/4" bolt circles
- Fits axle with a maximum flange diameter of 6-1/4" O.D.
- 2.780" rotor center hole
- Includes emergency brake calipers
- Does not fit all 10 & 12 bolt axles - check Applications for details
- Requires 15" and larger wheels as 14" and smaller wheels will not clear application.
910-31924 Instructions (PDF)
For more details and installation photos, see this article in Super Chevy magazine.
This kit will fit 10 & 12 Bolt rear ends from:
The housing flange must have:
- 3-1/8" center-to-center distance for the top two bolt holes
- 2-11/16" center-to-center distance for the bottom two bolt holes
- 2-7/16" distance from the center of the top bolt to the center of the bottom bolt
- Axle Flange Identification Chart (GIF)
This kit requires 15" and larger wheels.
Note: This disc brake kit does NOT fit all 10 & 12 bolt rear axles. It does NOT fit full size car (Biscayne, Bel Air, Impala) or pickup rear axles. Kit does not clear 14" and smaller wheels.
What's In The Kit
1978-Up GM Metric Emergency Brake Caliper, LH, 5.45 Mount BoltsPart # 91031046-LQty x 1
1978-Up GM Metric Emergency Brake Caliper, RH, 5.45 Mount BoltsPart # 91031046-RQty x 1
Speedway Replacement 11-1/4 Inch Rear Brake RotorPart # 91031039Qty x 2
Caliper Brackets - GM 10 & 12 Bolt Bolt OnPart # 91031983Qty x 1
Caliper Bolt Kit - 910-31983Part # 91031983-2Qty x 1
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Q & A
Tim talks about brake booster adjustment.
We get a lot of questions about brake kits so Tim gives a brief overview of disc brake setups.
Tim demonstrates the brake assembly with a Wide 5 drum brake and Speedway's new self-energizing backing plate.
Learn how to install an adjustable proportioning valve block.