Achieve disc brake performance for your pre-1980 Ford passenger car 9 Inch rear-end with our easy to install, bolt-on conversion kit, This kit provides all the brackets & flanges that fit the three most popular sizes of the 9 Inch rear-end (3-3/8" x 2", 3-1/2" x 2-3/8", 3-9/19" x 2"), Comes with drilled and slotted 11" cast iron rotors that are dual drilled for 5x4.5" for 1/2" studs and 5x4.75" for 7/16" studs, Includes loaded black single piston calipers, stainless steel brake hoses, E-brake cables & loaded calipers, as well as all brackets & hardware, Requires use of 15" wheels and an axle flange that has a diameter of 6-1/4" or smaller, if larger than 6-1/4" you'll need to machine it down to size
Universal Ford 9" Rear-End Disc Brake Conversion Kit, Black Speedway Motors
Universal Ford 9" Rear-End Disc Brake Conversion Kit, Black
Sku # 91664088
Mfr. Part # 91664088
Condition
New
Brand
Speedway Motors
Sold
Set
Details
Info

The Speedway Ford 9" Rear End Disc Brake Kit provides an easy to install, bolt on solution for upgrading your pre-1980 Ford passenger car 9” rear-end to disc brake performance. Speedway's Ford 9" Rear End Disc Brake Kit is unique in that it provides all the brackets and flanges that fit the three most popular sizes of the 9” rear end (3-3/8” x 2”, 3-1/2” x 2-3/8”, 3-9/19” x 2” ). This eliminates all guesswork when purchasing and installing the kit. The DBK9 comes in both standard and high performance models. The high performance LX kits upgrade to cross-drilled and slotted rotors and stainless steel braided brake lines.

  • Black Rear Single Piston Calipers
  • D154 Pads Included
  • Stainless Steel Brake Hoses
  • Caliper Brackets
  • E-Brake Cables
  • Mounting Hardware
  • E-Brake Rear Loaded Calipers
  • Brackets & Flanges to fit:
    • 3-3/8” x 2”
    • 3-1/2” x 2-3/8”
    • 3-9/19” x 2”
  • Drilled/ Slotted Rotors
    • Drilled 5x4.5" for 1/2" Studs
    • Drilled 5x4.75" for 7/16 Studs
  • Fits Small Bearing Rear Ends
  • 11" Vented Rotors
  • Center Opening Of 2.78"
Charts

(PDF)

(PDF)

Installation Tips
  • The installation of disc brakes will require the use of 15" disc brake wheels. Any attempt to install disc brake with a 14" wheel will be the installers responsibility.
  • This kit is an aftermarket solution. It is not intended to be a direct installation or OEM replacement. Due to changes in production in certain years, your application may require modifications beyond these instructions for this kit to install properly.

Installation note:

  • The inside diameter of this rotor will accept an axle flange that has a diameter of 6-1/8" or smaller. If your axle flange exceeds 6-1/8" in diameter, you will need machine your axle flange to decrease your axle flange diameter to fit this rotor as necessary.
  • When utilizing an aftermarket axle with disc brake conversion kits, it may be necessary to reduce the diameter of the axle flange to a diameter necessary to adequately fit inside the required Clearance I.D. that the brake hat/brake rotor will require. (see above diagram for illustration)
Specs
Sold in Quantity
Kit
Color
Black
Rotor Diameter
11 Inch
Minimum Recommended Wheel Diameter
15 Inch
Rotor Shape
Round
Caliper Finish
Powder Coated
Hardware Included
Yes
Parking Brake Provision
Yes
Position
Rear
Rear Rotor Included
Yes
Front Spindles Included
No
Master Cylinder Included
No
Brake Booster Included
No
Brake Hose Material
Stainless Steel Braided
Brake Hoses Included
Yes
Front Caliper Included
No
Front Rotor Included
No
Rear Caliper Included
Yes
Rotor Type
Vented
Bolt Pattern
5 on 4.5" | 4.75"
Caliper Pistons
One
Parking Brake Cables Included
Yes
Rotor Style
Drilled & Slotted
Front Caliper Piston Quantity
1
Front Rotor Diameter
11 Inch
Ford Bearing End Style
Big Ford (Old/New) & Small Ford
Axle Flange Offset
2.36" - 2.50"
MFG. Part #
91664088
Front Caliper Finish
Powder Coated
Reviews

Strong Conversion Kit with Easy Instructions!

Rated
Product Rating
by Colby G. on January 10, 2022

Summary: I have looked at this kit through and through and it is getting installed this week!

Yes, I recommend this product.

Very easy even too easy.

Rated
Product Rating
by Mattthecat on May 05, 2021

Summary: I was worried about me setup. The pictures, videos, and descriptions worked and helped me understand. Install was easy and I am very pleased with the product. Price was comparable and the slotted disks look great. Make sure you read the description in full as I almost bought the wrong item.

Pros: Description was spot on

Yes, I recommend this product.

Very Nice Kit!

Rated
Product Rating
by Prostreetdon on January 19, 2021

Summary: This kit was pretty easy to install. All the pieces are of decent quality and fit with no modifications.

Yes, I recommend this product.

Great kit excellent price!

Rated
Product Rating
by Dean on October 11, 2020

Summary: Great instructions ease of installation makes the rear end complete!

Yes, I recommend this product.

Pretty nice kit!

Rated
Product Rating
by Brett on September 13, 2020

Summary: For the price this is a nicely equipped kit. Pay attention to how the axle retainer and brackets mount, I had to figure mine out since instructions weren't that great.

Cons: 5x4.75"-7/16" studs - had to drill mine to 1/2" Instructions are very detailed, sort of expected

Pros: Drilled and slotted rotors are nice touch E-brake option

Related Items / Suggested Parts
Tech Support
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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 72 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.