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Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 3 Inch Backspace

Price:$259.99
Metric Complete Rear Disc Kit, 3" Back Space
Price:
$259.99
KT
On Order
Item #:
91031931
Open Kit Components
- Selection of individual components may be necessary for kit purchase.
Weld-On Rear Disc Brake Kit, 1978-88 GM Caliper, 3 Inch Backspace
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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. 

Steel hat fits 5 lug hubs with 4-1/2", 4-3/4", or 5" bolt circle.

910-31931 Instructions (PDF)

  • 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)
    • Stamped steel, 3" backspace
    • 3.06" center hole, 6-1/4" I.D., 1/2" stud holes, 2 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
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