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#91031932
Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace
- Replace those old drum rear brakes with modern disc brakes using this universal weld on disc brake kit
- Features GM Metric calipers with massive 2.38" piston size which provide excellent braking in a compact size
- 11.75" OD vented rotors which are .81" thick ensure cool operation for fade free braking performance
$384.99
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Product Summary
Universal Fit, Rear Position, 11.75 Inch Rotor Diameter
- Replace those old drum rear brakes with modern disc brakes using this universal weld on disc brake kit
- Features GM Metric calipers with massive 2.38" piston size which provide excellent braking in a compact size
- 11.75" OD vented rotors which are .81" thick ensure cool operation for fade free braking performance
- This complete kit includes calipers, rotors, brake pads, brake hats, caliper slide bolts, and caliper brackets
- The 1.59" offset CNC machined aluminum brake hat accommodates 5 on 4-1/2, 4-3/4", and 5 on 5" bolt circles
Comes as a Kit
View Kit Components
Key Specs
| MFG. Part # | 91031932 |
| Position | Rear |
| Rotor Diameter | 11.75 Inch |
| Rotor Type | Vented |
| Caliper Pistons | One |
Need To Know
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Return PolicySpeedway Motors 91031932 Details
Speedway Motors 91031932 Details
Replace those old drum brakes with modern rear disc brakes. Mounts .81" x 11-3/4" Pro-lite vented iron rotors and calipers to 3" tube rear end. Complete with rotors, hats, metric calipers (7/16"-20 inlets), brackets, brake pads, caliper brackets and slider bolts.
Hat fits 5 lug hubs with 4-1/2", 4-3/4", or 5" bolt circle.
Charts
910-31932 Instructions (PDF)
Specs
- Caliper Brackets (2)
- Weld onto a 3" axle tube
- Rotors (2)
- GM-style .81" x 11-3/4", 8 on 7" bolt pattern
- Straight vanes, 8 lbs. each
- Rotor Hats (2)
- Machined Aluminum, 1.59" offset
- 3.06" center hole, 6-3/8" I.D., 1/2" stud holes, 1.5 lbs.
- Rotor Bolt and Nut Kit (2)
- Caliper Slider Bolts (4)
- Brake Pads (2 sets)
- Street compound, little metallic, long rotor and pad life
- Calipers - 1978-88 GM Metric (L & R)
- 7/16"-20 inlet
- Cast iron body, 2.38" single piston
- Saves 3.5 lbs. per side compared to '69-'77 GM calipers
Speedway Motors 91031932 Specifications
Speedway Motors 91031932 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031932 |
| Brand | Speedway Motors |
| Position | Rear |
| Rotor Diameter | 11.75 Inch |
| Rotor Type | Vented |
| Caliper Pistons | One |
| Caliper Finish | Natural |
| Parking Brake Provision | No |
| Minimum Recommended Wheel Diameter | 15 Inch |
| Rotor Shape | Round |
| Hardware Included | Yes |
| Rotor Style | Plain Face |
| Front Rotor Included | No |
| Front Rotor Diameter | 11.75 Inch |
| 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 |
| Finish | Natural |
| Rotor Hat Bolt Pattern | 8 x 7.00" |
| Color | Natural |
| Front Caliper Finish | Natural |
| Bolt Pattern | 5x4.5 | 5x4.75 | 5x5 |
| GENERAL | |
| Sold in Quantity | Kit |
| Notes | Includes rotors, rotor hats, caliper brackets, calipers, pads, and hardware. |
| Rotor Thickness | 0.81" |
| Thread Pitch | 7/16"-20 |
| Centerline of Holes | 5.5" |
| Rotor Material Type | Cast Iron |
Ratings & Reviews
4.5
8 Reviews
Customers appreciate the product's affordability and high quality. Notably, its great performance and fit make it particularly suitable for 15" rim applications. Although some features like brake pad spacers and hoses are not included, users found the overall kit to be well put together. Some noted that additional purchase didn't affect their satisfaction given the product's value. However, users suggest that inclusion of necessary parts and clearer descriptions could improve the product's practicality. Despite lack of instructions, the product's quality was confirmed.
Ratings & Reviews
4.5
8 Reviews
Customers appreciate the product's affordability and high quality. Notably, its great performance and fit make it particularly suitable for 15" rim applications. Although some features like brake pad spacers and hoses are not included, users found the overall kit to be well put together. Some noted that additional purchase didn't affect their satisfaction given the product's value. However, users suggest that inclusion of necessary parts and clearer descriptions could improve the product's practicality. Despite lack of instructions, the product's quality was confirmed.
4.5
8 reviews
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Awesome support and excellent product.
5.0
5 months ago
MSM
Edinburg TX
Verified
Walked through the specific parts for my project and found the perfect fit. Excellent support.
Would Recommend
I would buy again if I had to
5.0
3 years ago
Hot Rod Sabookie
San Bernardino Ca
Verified
I'm happy with the price but for a couple dollars more can get a bolt on kit.
Would Recommend
Great product
5.0
6 years ago
Christian Mazza
Jacksonville,Florida
Verified
Works great
Would Recommend
Well put together kit!
5.0
7 years ago
Brian
Fremont Nebraska
Verified
High quality, just wish it came with the hoses.
Would Recommend
Great parts and fit
5.0
7 years ago
48 Custom
Ohio
Verified
What I needed
The product was great for my application.
5.0
9 years ago
Jimmy's Street Rod Shop
Concordia, KS
Verified
The Brake set up work out perfectly for the 15" rim application.
Would Recommend
good product for the money
3.0
9 years ago
eds hot rod shop
mount vernon arkansas
Verified
the kit does NOT include brake pad spacers that are required for metric calipers on these rotors...had to buy seperatley..the expense did not bother me, but required a delay waiting on parts...these should be included in the kit or some kind of note added in the description to prevent a delayed install.
Would Recommend
Rear disc
3.0
10 years ago
Scotty
Lubbock tx
Verified
No instructions no help when calling tech. Quality of product was good
Would Recommend
Showing 8 of 8 reviews
Questions & Answers
1 Question • 1 Answer
Questions & Answers
1 Question • 1 Answer
wheel fitment, distance to frame and fenderwell remain stock?
by PeterAlmada
• 12 years ago
1 answer
View Answer
1 of 1 questions shown