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#91031925
Basic Weld-On Rear Disc Brake Kit for 1978-88 GM Caliper, 3 In BS
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- Replace those old drum rear brakes with modern disc brakes using this universal weld on disc brake kit
- Features reinforced weld on brake brackets for use with GM Metric brake calipers
- 11.75" OD vented rotors which are .81" thick ensure cool operation for fade free braking performance
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$200.99
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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 reinforced weld on brake brackets for use with GM Metric brake calipers
- 11.75" OD vented rotors which are .81" thick ensure cool operation for fade free braking performance
- This basic kit includes rotors, brake hats, and caliper brackets to allow you to choose your own calipers
- The 3" backspace steel 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 |
| Parking Brake Provision | No |
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Speedway Motors 91031925 Details
Replace those old drum brakes with modern rear disc brakes. Included steel caliper brackets weld to your 3" tube rearend, making this a universal kit for a variety of applications. Basic kit includes caliper brackets for '78-'88 GM metric car front calipers, Pro-lite vented .810" x 11-3/4" iron rotors, steel brake hats (3" backspace, 6-1/4" I.D.), and rotor bolts.
Hat fits 5 on 4-1/2", 5 on 4-3/4" and 5 on 5" bolt circles.
Charts
910-31925 Instructions (PDF)
Instructions (PDF)
Speedway Motors 91031925 Specifications
Speedway Motors 91031925 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031925 |
| Brand | Speedway Motors |
| Position | Rear |
| Bolt Pattern | Multi: 5 on 4.5" | 4.75" | 5" |
| Rotor Diameter | 11.75 Inch |
| Rotor Type | Vented |
| Parking Brake Provision | No |
| Rotor Shape | Round |
| Hardware Included | Yes |
| Front Rotor Included | No |
| Front Caliper Included | No |
| Rear Caliper Included | No |
| 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 |
| Finish | Natural |
| Sold in Quantity | Kit |
| Notes | Includes rotors, rotor hats, caliper brackets, hardware, and instruction sheets. |
| Rotor Material Type | Cast Iron |