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#91031924
$409.99
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GM 8.2 Inch 10-Bolt BOP, Rear Position, Natural
Comes as a Kit
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| MFG. Part # | 91031924 |
| Position | Rear |
| Wheel Bolt Pattern (in.) | 5x4.5 in. | 5x4.75 in. |
| Wheel Bolt Pattern (mm) | 5x114.3 mm | 5x120.65 mm |
| Rotor Diameter | 11.25 Inch |
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855.313.9176Quick and Easy Returns
Return PolicyWe tend to look back at the muscle car era of the 60’s and 70’s through rose-colored glasses. Everybody remembers lumpy solid lifter camshafts, big compression ratios, and blinding straight-line acceleration. But in the six decades or so that have passed since those big block-powered dinosaurs ruled the roads, we’ve gotten used to some modern performance and safety features that become conspicuous in their absence when we jump in the old Chevelle or Camaro for a trip across town. Those drum brakes that were just fine in 1969 can lead to some panic inducing near misses in modern traffic. To add some performance and peace of mind, don’t drop the bucks on a rebuild of those archaic rear drum brakes. Instead, consider a bolt-on rear disc brake conversion that won’t cost much more than a drum brake refresh, but will add some serious performance and safety to your GM midsize or ponycar.
Back in the day, only factory hot rods like the Z/28 were fitted with rear discs. The rest of the herd was saddled with heavy, fading rear drums. This Speedway Motors GM 10 & 12 Bolt Bolt-On Rear Disc Brake Kit makes it easy to bolt up the brake setup that was a trick high performance option when your GM midsize muscle car rolled off the line. This kit comes with everything needed to bolt GM Metric calipers on your 10 or 12-bolt GM rearend housing with no welding required. The caliper brackets in this kit simply bolt-on to the housing flange, making the install an afternoon job, not a full-on fabrication project. You can choose calipers with or without an emergency brake and the calipers come complete with brake pads and slide bolts. This kit also comes with a pair of vented 11-1/4” rotors. There may be bigger and more expensive rear disc brake kits out there, but this one delivers impressive performance at an affordable price while still looking more trick than those rusty old drums when viewed through big-inch Pro Touring-style wheels.
For more details and installation photos, see this article in Super Chevy magazine.
Kit Includes:
Application
Note that GM made many variants of the venerable 10 and 12-bolt rear. The brackets in this kit are configured to fit housings that do NOT have staggered shocks. There’s a full list of applications below, but typically, you’re going to find these in midsize cars like Chevelle and Cutlass from ’64 into the 70’s as well as first-gen Camaros and many years of Chevy II/Nova.
This kit is designed to fit 10 & 12 Bolt rear ends from:
This kit is NOT designed to fit the following:
To verify that this kit will work on your axle, you can double check that the flange where the caliper bracket will bolt up has the following dimensions:
Also check that the axle flange where the lug studs are pressed on has an outside diameter that is no larger than 6-1/4” and a brake register (the raised part at the center) that is no larger than 2.78".
Charts
Specs
The caliper piston pin needs to be aligned with the notch in the pad to avoid fitment issues.
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031924 |
| Brand | Speedway Motors |
| Position | Rear |
| Wheel Bolt Pattern (in.) | 5x4.5 in. | 5x4.75 in. |
| Wheel Bolt Pattern (mm) | 5x114.3 mm | 5x120.65 mm |
| Rotor Diameter | 11.25 Inch |
| Rotor Type | Vented |
| Caliper Pistons | One |
| Caliper Finish | Natural |
| Parking Brake Provision | Yes |
| Minimum Recommended Wheel Diameter | 15 Inch |
| Rotor Shape | Round |
| Hardware Included | Yes |
| Rotor Style | Plain Face |
| Front Rotor Included | No |
| Front Caliper Included | No |
| Rear Caliper Included | Yes |
| Front Spindles Included | No |
| Master Cylinder Included | No |
| Brake Booster Included | No |
| Brake Hoses Included | No |
| Rear Rotor Included | Yes |
| Color | Natural |
| Bolt Pattern | 5 on 4.5" | 4.75" |
| GENERAL | |
| Sold in Quantity | Kit |
| Notes | Includes rotors, calipers, pads, hardware, and caliper brackets. |
| Rotor Thickness | 1" |
4.3
15 Reviews
Customers generally affirm the product’s utility and quality in classic car maintenance and upgrade tasks. The product's straightforward setup is frequently mentioned, boasting a good fit and easy assembly. Excellent quality materials and a robust finish underscore its longevity and sound performance. The product noticeably improves stopping power, enhancing overall driving safety. Some customers highlight modifications for specific applications, pointing to its versatility. However, compatibility with certain wheel sizes is a minor concern. Despite this, customers appreciate the product's enhancement to their vehicles and enthusiastically recommend it.
4.3
15 reviews
5
9
4
3
3
2
2
0
1
1
Most Liked Positive Review
4.0
great products over and over
I installed this kit on a 10 bolt rear under my 58 chevy truck and everything fit perfectly, I have not had the opportunity to drive the truck with the new brakes but definitely look forward to it now.
Most Liked Negative Review
1.0
Rear disc brakes for 67 chevy II
As mentioned in the earlier review of the front disc---I am using org. 14 inch disc brake rally wheels. They do not work with your rear brakes and I will be returning. I also tried 15 inch rally wheels with the same results. It looks like I must go back to drum brakes on the rear----very disappointed and a lot of work.
Filter by Ratings
I would buy again
5.0
2 years ago
Shawn
Pa
Verified
1972 nova worked great. Had to put the driver side caliper towards the front because of the shock but other than that perfect.
Would Recommend
Good fit
5.0
2 years ago
Two tone
Mpls
Verified
Went right in
Would Recommend
Would buy again
5.0
2 years ago
Jim
Lincoln, Delaware
Verified
Stops great!
Would Recommend
yes
5.0
3 years ago
Big Ed
Candor NY
Verified
In stock item always !!!
Would Recommend
It didn't come with any brake lines
3.0
5 years ago
Kyle
Kona hi
Verified
Went together easy
Would Recommend
I would use this again
5.0
5 years ago
Stephen White
Plainview TX
Verified
The bracket and all fit perfect
Would Recommend
Should work great for the rest of its life
5.0
8 years ago
Antiquer
Perry Kansas
Verified
I plan on using this product is self preservation of a classic car
Would Recommend
Yes
4.0
8 years ago
Charlie 1/16th because Iam so fussy
Las Vegas/ Nv.
Verified
Only thing that would be better is if they self-installed...................................thats why the 4 stars................
Would Recommend
Rear disc brakes for 67 chevy II
1.0
8 years ago
jim
35146
Verified
As mentioned in the earlier review of the front disc---I am using org. 14 inch disc brake rally wheels. They do not work with your rear brakes and I will be returning. I also tried 15 inch rally wheels with the same results. It looks like I must go back to drum brakes on the rear----very disappointed and a lot of work.
Would Not Recommend
NICE PACKAGE
5.0
9 years ago
BAKERMAN
WICHITA KS.
Verified
AS DICRIBED
Would Recommend
Showing 10 of 15 reviews
24 Questions • 14 Answers
When installing on a '73 Camaro rear end, will this kit push the wheels out at all vs. the drum setup?
by Rick
• 8 years ago
4 answers
View Answers
What is the minimum wheel size for this kit? will it fit 15" rims?
by JW
• 8 years ago
2 answers
View Answers
Would this kit fit my 1972 Grand Prix (400ci)?
by Geoff
• 9 years ago
1 answer
View Answer
What kit will I need to change rear drum brakes to disc brakes on a 1967 impala
by Sam
• 9 years ago
1 answer
View Answer
I'm installing this brake kit on my 71 nova. What brake line kit and fittings do i need to complete this installation?
by Rob69bird
• 9 years ago
1 answer
View Answer
I have this kit installed now. I want to upgrade calipers to Wilwood that you offer and I don't need parking brake. Which ones do I need to purchase?
by Rick
• 9 years ago
1 answer
View Answer
What rear brake hoses are needed to go with this kit? And will factory emergency brake cables work also?
by 72mobucks
• 9 years ago
1 answer
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Will this kit fit my 1985 SS Monte Carlo?
by James
• 9 years ago
1 answer
View Answer
This kit is listed for 1957 Chevy 150 but I saw in the comments that it does not fit full size Chevy (ie. Belair). Is that comment for later model years? Should this work on a 1957 Chevy 150 with stock rear axle?
by James
• 9 years ago
1 answer
View Answer
Is there a cross drilled rotor that match this kit? Part number?
by Andy
• 10 years ago
1 answer
View Answer
10 of 24 questions shown
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