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Ford 9 Inch Bolt-On Rear Disc Brake Kit

Price:$349.99
Bolt-On Rear Disc Brake Kit, 9" Ford
Price:
$349.99
KT
In Stock
Item #:
91031902
Item Details:
With non-emergency brake calipers.
Open Kit Components
- Selection of individual components may be necessary for kit purchase.
Kit Components
11-1/4" Rear Brake Rotor, 4.5" and 4.75" BP
Item #:
91031039
2
  Show Specifications
  • 91031039
    Outside Diameter
    11.290"
    Inside Diameter
    2.780"
    Overall Thickness
    1.000"
    Flange Diameter
    6.750" (6 3/4")
    Bolt Pattern
    Dual: 5 on 4.5"/4.75"
    Material Type
    Iron
    Finish
    Natural
    Sold in Quantity
    Each
    Notes
    Has a backspace of 2.30".
Speedway 156 '78-Up Metric Brake Pads
Item #:
9191562
Item Details:
Aluminum/Steel rotors, best pad for aluminum rotors, low metallic, long life, excellent street
2
GM Metric Disc Brake to 9" Ford Bracket Set
Item #:
91031981
1
Bolt Kit for 910-31981
Item #:
91031981-2
1
1978-88 GM Metric Caliper
Item #:
91031045
Item Details:
7/16"-20 Inlet
5 1/2" mount spacing
Side: L
1
1978-88 GM Metric Caliper
Item #:
91031045
Item Details:
7/16"-20 Inlet
5 1/2" mount spacing
Side: R
1
GM Caliper Slider Bolt
Item #:
8352300542
4
  Show Specifications
  • 8352300542
    Material Type
    Steel
    Overall Length
    4.375" (4 3/8")
    Wrench Type
    Allen
    Under Head Length
    3.375" (3 3/8")
    Sold in Quantity
    Each
    Notes
    7/16-20 Thread
 
(1 Rating)
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If you don't want to spend an arm and a leg on a rear disc brake kit and still have to weld the bracket on, we've got you covered. This kit includes bolt-on caliper brackets, 11-1/4" vented rotors, '78-'88 GM metric style calipers, brake pads and hardware.

  • Fits both 5 on 4-1/2" and 5 on 4-3/4" bolt circles
  • For Ford passenger car axles ONLY 
  • Fits axle with maximum flange diameter of 6-1/4" O.D.

NOTE: This bolt on brake kit is designed to be used on 8" and 9" housings using 3/8" retaining bolts. If you want to use it on a 9" housing with 1/2" bolts, you will need to use the 3/8" hardware to do so. Fits "old" and "new" style big bearing (3.150" bearing O.D.) Ford housings and with axle offsets of a minimum 2-3/8" to 2-1/2".

Axle Flange Identification Chart (GIF)

910-31902 Instructions (PDF)

  • "Old-style" big bearing 9" Ford axle
  • "New-style" big bearing 9" Ford axle
  • 8" Ford axle
  • Axle housings with minimum axle offsets of 2-3/8" to 2-1/2"

This kit will NOT work on pickup housings or the 50's 9" housings as they only have about 2" backspace. The exception would be the late 50's station wagon rear ends.

Reviews for Item #: 91031902
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[ 2 of 2 customers found this review helpful ]
 

9 Inch Ford Bolt On Brakes

By radracr from Houston, Texas on 4/4/2011
Pros:
Decreased Stopping Distan, Easy To Install
Cons:
Heavy
Car & Truck:
Competitive Driver
Bottom Line: Yes, I would recommend this to a friend

For my application I converted the housing ends of my 8.5" GM 10-bolt to a Moser Circle Track Axle Package...so I needed an easy to install package...this is it!!...and, the guys at Speedway were able to line me up with all the other pieces needed to complete the install...even with my application it was an amazingly simple install...highly recommended...

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Questions and Answers for Item #: 91031902

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4 Questions | 4 Answers
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Q:

What is the part number of the brake hoses for this kit? Thanks, Jim

Asked on 1/6/2011 10:19:28 AM by Jim from Bethpage N.Y.

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Q:

ALREADY PURCHASED THIS SYSTEM.WHAT SIZE IS THE STUD'S ON THIS ITEM..NEED TO KNOW WHAT SIZE LUG NUTS TO BUY..NEED A SHANK STYLE FOR CENTERLINE RIM'S I AM BUYING...

Asked on 5/5/2011 11:43:48 AM by DOUG from JACKSONVILLE, FL

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Q:

What are the pads and rotor off of? If i need to purchase replacements in the future is it something hard to obtain? I've heard of guys using a Trans-Am rotor... but they need re-drilled for the 5x4.5 Ford pattern...

Asked on 5/9/2011 1:23:34 AM by tkffaul from Canton, Oh

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Q:

will these work with 15"x12"wide rims?

Asked on 7/23/2011 11:18:52 AM by robert of mtz from martinez ca

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