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#91031932
Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace
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- 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
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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
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Key Specs
| Position | Rear |
| Bolt Pattern | Multi: 5 on 4.5" | 4.75" | 5" |
| Rotor Diameter | 11.75 Inch |
| Rotor Type | Vented |
| Caliper Pistons | One |
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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 |
| Bolt Pattern | Multi: 5 on 4.5" | 4.75" | 5" |
| Rotor Diameter | 11.75 Inch |
| Rotor Type | Vented |
| Caliper Pistons | One |
| Caliper Finish | Natural |
| Color | Natural |
| Parking Brake Provision | No |
| Rotor Shape | Round |
| Hardware Included | Yes |
| Front Rotor Included | No |
| Front Caliper Included | No |
| Rear Caliper Included | Yes |
| Front Spindles Included | No |
| Master Cylinder Included | No |
| Brake Booster Included | No |
| Rear Rotor Included | Yes |
| GENERAL | |
| Rotor Hat Bolt Pattern | 8 x 7.00" |
| Rotor Thickness | .81" |
| Thread Pitch | 7/16"-20 |
| Centerline of Holes | 5.50" |
| Finish | Natural |
| Sold in Quantity | Kit |
| Notes | Includes rotors, rotor hats, caliper brackets, calipers, pads, and hardware. |
| Rotor Material Type | Cast Iron |