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#91031981
GM Metric Disc Brake to 9 Inch Ford Bracket Set
- Disc brake kit allows you to bolt 1978 and up GM Metric disc brakes on your Ford 9" rear end
- Includes caliper brackets, adapter plates, spacer plates, and spacers
- Very versatile kit fits both 5 on 4-1/2" and 5 on 4-3/4" bolt circles
$136.99
/set
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Product Summary
Ford 9 Inch, Steel, Zinc Plated
- Disc brake kit allows you to bolt 1978 and up GM Metric disc brakes on your Ford 9" rear end
- Includes caliper brackets, adapter plates, spacer plates, and spacers
- Very versatile kit fits both 5 on 4-1/2" and 5 on 4-3/4" bolt circles
- For 15" and larger wheel applications ONLY
- This kit will NOT work on pickup housings or the 50's 9" housings as they only have about 2" backspace
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Speedway Motors 91031981 Details
Allows you to bolt '78 an Up GM Metric disc brakes on Ford 9" rearend.
- Fits both 5 on 4-1/2" and 5 on 4-3/4" bolt circles
- For Ford passenger car axles ONLY
- Fits axle with maximum flange diameter of 6-1/4" O.D.
- For 15" and larger wheel applications ONLY
Includes:
- 2 Caliper brackets
- 2 Adapter plates
- 2 Spacer plates
- 4 5/16" spacers
- 4 1/8" spacers
Note: This bolt on brake kit is designed to be used with big bearing 9" housings using 3/8" retaining bolts. If you want to use it on a 9" housing with 1/2" bolts, you will need to use the 3/8" hardware to do so. Fits "old" and "new" style big bearing (3.150" bearing O.D.) Ford housings and with axle offsets of a minimum 2-3/8" to 2-1/2".
Application
- "Old-style" big bearing 9" Ford axle
- "New-style" big bearing 9" Ford axle
- Axle housings with minimum axle offsets of 2-3/8" to 2-1/2"
Note: This kit will NOT work on pickup housings or the 50's 9" housings as they only have about 2" backspace. The exception would be the late 50's station wagon rear ends.
Charts
Guides & Documents
Speedway Motors 91031981 Specifications
Speedway Motors 91031981 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031981 |
| Brand | Speedway Motors |
| Material Type | Steel |
| Finish | Zinc Plated |
| GENERAL | |
| Hardware Included | No |
| Sold in Quantity | Set |
| Notes | Includes caliper brackets, adapter plates, spacer plates, and spacers. |
Ratings & Reviews
4.6
21 Reviews
The product is appreciated for its quality and user-friendly installation. Many customers found it fitted their vehicles perfectly, underlining its practicality. The zinc finish is commended for durability, and the plasma cuts for their neatness. However, modification was needed for some models. The kit is overall considered good value for money, particularly when compared to higher-priced competitors like Wilwood. Customers recommended it mainly for the 9" back end, underlining its performance and versatility. Most customers would purchase the product again. There were a few negative comments about lack of bolts and instructions.
Ratings & Reviews
4.6
21 Reviews
The product is appreciated for its quality and user-friendly installation. Many customers found it fitted their vehicles perfectly, underlining its practicality. The zinc finish is commended for durability, and the plasma cuts for their neatness. However, modification was needed for some models. The kit is overall considered good value for money, particularly when compared to higher-priced competitors like Wilwood. Customers recommended it mainly for the 9" back end, underlining its performance and versatility. Most customers would purchase the product again. There were a few negative comments about lack of bolts and instructions.
4.6
21 reviews
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Most Liked Positive Review
5.0
Used on a Scout 2 with modification
Nice zinc finish and realy good plasma cutss for nice edges and holes. Was hoping the offset was similar to the Fords, but the ears where the bracket for the caliper mounts to the bracket that bolts to the wheel bearing retainer interfere with the rotors. My solution was to cut off half the bracket that would normally mount on the bearing retainer and welded it to the axle tube. Lucky for me I happen to have a welder and doing a custom build anyway.
Most Liked Negative Review
2.0
the whole package appeared complete and
found the support brackets to be bent or warpped, which in turn caused alighnment problems between the caliper and the slide pins. Chuck
Filter by Ratings
Nice kit even though I couldn't use
4.0
5 months ago
Jason M
Michigan
Verified
Would not clear the rotors I purchased previously so had to return. However the kit was well made and I would liked to have used.
Would Recommend
Nice brackets
5.0
10 months ago
Ghost
Ohio
Verified
Have a nice finish, very thick fit large flange 9" on gbody
Would Recommend
Worked great
5.0
a year ago
Ray
Michigan
Verified
Easy install and fitment was spot-on, no modifications required.
Bolts right up to a ford 9" axle ends.
5.0
2 years ago
Dirt racer
Texas
Verified
Great product and did exactly what I wanted. Bolted right up to a 9" axle flanged end. Only problem I had was had to disassemble to remove the axle. I grinded down part of the T bolts to where they would side out and remove the assembly, and then able to get axle out/in.
Would Recommend
Used on a Scout 2 with modification
5.0
3 years ago
Van
Twin Falls, ID
Verified
Nice zinc finish and realy good plasma cutss for nice edges and holes. Was hoping the offset was similar to the Fords, but the ears where the bracket for the caliper mounts to the bracket that bolts to the wheel bearing retainer interfere with the rotors. My solution was to cut off half the bracket that would normally mount on the bearing retainer and welded it to the axle tube. Lucky for me I happen to have a welder and doing a custom build anyway.
Very helpful staff and parts were perfect
5.0
3 years ago
Dale
Texas
Verified
Installed it in a 9 inch rear end with disc brakes
Would Recommend
useful
5.0
4 years ago
herman
indonesia
Verified
yesss
Would Recommend
I would buy this product again.
5.0
4 years ago
Tim
Nashville, TN
Verified
Fit my 68 Mustang with new 9" Currie rear-end. Was happy to get my calipers and wheels back on the car!
Would Recommend
A very user friendly brake kit
5.0
4 years ago
Superbaker
Goshen, In.
Verified
I really liked the kit with ease of installation and good instructions
Would Recommend
Good kit
5.0
5 years ago
Qw
South Dakota
Verified
Good quality kit. Fit was very good. Not sure if bolts are supposed to be included or not, but would have been nice to have the bolts included that attach the caliper brackets with the spacers.
Would Recommend
Showing 10 of 21 reviews
Questions & Answers
Questions & Answers
17 Questions • 13 Answers
How to install part #91031981
by shaun
• 7 years ago
1 answer
View Answer
Will this kit work with brakes form a 2007 Cadillac Escalade ext. 14 inch rotors
by Jim
• 8 years ago
1 answer
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Note: This kit will NOT work on pickup housings or the 50's 9" housings as they only have about 2" backspace. I have a big bearing ford 9" truck rear end 1950 I think. What kit is there to put disc brakes on it? (or drum)
by rayfin
• 8 years ago
1 answer
View Answer
Why will this kit not work for a 5 x 5.5" Bolt pattern wheel? A similar kit used by Tom's Bronco Parts supply a rotor for 5 X 5.5" wheel.
by Tall T Coupe
• 9 years ago
2 answers
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I'm working on a1967 Camaro and want to put in a Currie 9" but use the Right stuff brake kit I have AFXDC42CZX it came with caliper BC3839N will this work for this application? Or do you have one that will
by D
• 9 years ago
2 answers
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How thick are the Caliper Brackets ? Both main Brackets
by DIVCO13
• 10 years ago
1 answer
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The description states that if installed on an axle with 1/2" bolts the 3/8" hardware must be used. How does that work? Won't the 3/8 bolts fit too loosely in the axle flange holes and allow caliper movement?
by James
• 10 years ago
1 answer
View Answer
I just orders this kit from you guys. I would like to know which rotors and calipars I need to make this kit work. Thanks
by Scott
• 10 years ago
1 answer
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Will this bracket adapt a 2000 Camaro rear disc brake to a Ford 9"? I will be purchasing the Ford 9" from Speedway Part # 91067691. will this bracket allow me to adapt a Camaro rear disc brake system out of a 2000( approx.) Camaro?
by Lloyd
• 11 years ago
1 answer
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Can I see installation instructions before buying this kit? Can you please post the installation instructions for this kit? It would be nice to see these before purchasing the kit.
by nickname2014
• 12 years ago
2 answers
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10 of 17 questions shown