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$279.99
Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace
Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace

Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace

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Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace
Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 1.59 Inch Backspace
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Part # 91031932
$279.99
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Details

Rotor Diameter:
11.75
Caliper Pistons:
Single
Caliper Finish:
Natural
Bolt Pattern:
Multi: 5 on 5"/4.75"/4.50"
Rotor Hat Bolt Pattern:
8 x 7.00"
Drilled:
No
Slotted:
No
Rotor Thickness:
.81"
Rotor Shape:
Round
Rotor Construction:
Vented
Thread Pitch:
7/16"-20
Centerline of Holes:
5.50"
Material Type:
Cast Iron
Finish:
Natural
Hardware Included:
Yes
Sold in Quantity:
Kit
Notes:
Includes rotors, rotor hats, caliper brackets, calipers, pads, and hardware.

Info

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.

910-31932 Instructions (PDF)

Notes

Brake pad and caliper installation note:  

This bracket features a 90 degree bend in the bracket at the slider bolt threaded area for additional caliper support.  This part of the bracket may or may not interfere with the corner of the inner brake pad backing plate due to differences in brake pad manufacturers.  When this occurs, it will be necessary to simply remove a minimal amount of backing plate material at each corner of the inner brake pad to allow for the necessary clearance between the bracket and brake pad when the caliper and pads are fully installed.

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
Some parts are not legal for use in California or other states with similar laws/regulations

Related Products

What's In The Kit

Each kit from Speedway Motors is carefully packaged and delivered right to your door. Below is a list of all the items you should expect to receive when you order this kit. Some of these items may also be available for sale individually if you're here looking for replacement parts.
  • Weld-On 1978-88 GM Metric Caliper Bracket
    Qty x 2
  • Speedway Pro-Lite Vented Brake Rotor, 11.75 x .81 Inch
    Qty x 2
  • Wilwood 170-0317 Rear Brake Drag Hat, 1.59 Inch Offset, Multi-5 Lug
    Qty x 2
  • Rotor Bolt Set - 5/16 x 3/4, Bolt Only
    Qty x 2
  • Speedway GM Brake Caliper Slider Slide Bolt
    Qty x 4
  • Speedway 156 1978-Up GM Metric Brake Pads
    Qty x 2
  • IMCA 1978-1988 GM Metric Caliper, LH Left Hand, 7/16-20 Inlet, Racing
    Qty x 1
  • IMCA 1978-1988 GM Metric Caliper, Right Hand, 7/16-20 Inlet, Racing
    Qty x 1
  • Instruct Sheet-Brake Kit
    Qty x 1

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