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Speedway Motors Ford 9 Inch Rearend Bolt-On Rear Disc Brake Kit, Universal Kit For Sale - New and Used


Speedway Motors Ford 9 Inch Rearend Bolt-On Rear Disc Brake Kit, Universal Kit
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Speedway Motors Ford 9 Inch Rearend Bolt-On Rear Disc Brake Kit, Universal Kit:
$351.99

Enhanced Stopping Power: Upgrade your Ford 9 inch or 8 inch rearend with this disc brake kit, providing superior stopping power compared to drum brakes., Complete Kit: The package includes two bolt-on caliper brackets, two 11-1/4" vented rotors, two GM metric style calipers (non-emergency brake), brake pads, and all necessary hardware for easy installation and increased stopping performance., Versatile Fit: Designed to fit over an axle with a maximum flange diameter of 6-1/4" O.D., this kit is compatible with "old" and "new" style big bearing Ford housings, offering flexibility for various applications., Durable Construction: The rotors have a 2.780" center hole and feature both 5 on 4-1/2" and 5 on 4-3/4" bolt circles, ensuring a secure and reliable connection. The components are made fro Ford 9 Inch Rearend Bolt-On Rear Disc Brake Kit Sku # 91031902 Mfr. Part # 91031902 Condition New Brand Speedway Motors Sold Kit Details Info Disc Brake Stopping Power at a Great Value

This economical disc brake kit for Ford 9 inch axles is simple to install and provides big stopping power, at a price nearly the same as replacing original drum brakes. That Ford rear end handles the power to make it go, but these binders clamp down when you say whoa! Today’s average family sedan can stop from 60 MPH in 120 feet, at nearly 1G of deceleration. You need the same stopping power. Your passengers, you and your car deserve the confidence of disc brakes and our kit delivers that confidence with exceptional value.

Superior to Drum Brakes

Aftermarket disc brakes are superior to original drums in many ways: more braking force, less brake fade, and easier service. Stopping power starts with our newly manufactured GM Metric D154 style single piston calipers, commonly found on 1978-88 GM G-Body and A-Body cars. Large 11-1/4” diameter, 1” thick vented rotors provide more stopping leverage than common 9” or 10” drum brakes. Brake pads are easier to change than drum shoes, and our brake kit includes a street-friendly organic compound for long rotor/pad life. Replacement pads are common sized, available from your local auto parts store. Looking for more aggressive stopping power? We carry race-grade D154 disc brake pads that drop in just as easily.

Fits Ford 9 Inch Housings

This disc brake kit fits Ford 9 inch axles, as well as passenger car Ford 9 inch axle housings with “big bearing” ends (3.150” O.D. bearing, found on passenger cars from 1974-79). Included bracketry will adapt this kit to both “new style” and “old style” Ford 9 inch housing flanges with the 3/8” bearing retainer bolt holes. Bracket spacers are also included, allowing this kit to work with axle flange offsets of 2-3/8” or 2-1/2” common on Ford 9 inch passenger car rear ends. Axle flange offset is measured from the axle housing flange face (with bearing retainer removed) to the axle shaft flange face (side where the brake rotor/drum rides, including the thickness of the axle flange).

Hardware and Instructions Included

Kit includes a detailed, step-by-step instruction sheet with images. The floating calipers include new Grade 5 slider bolts, with all remaining hardware of Grade 8 quality. Cast iron rotors feature a dual bolt pattern in 5x4.5” (Ford/Mopar/AMC) or 5x4.75” (Chevy/GM) to match your desired wheel hub pattern. Plus, this assembly will clear most 15” diameter wheels designed with disc brakes in mind. Note that there are no provisions for a parking brake, making this the perfect disc brake conversion kit for the budget-focused builder who prefers a basic upgrade kit.

  • Disc brake stopping power at nearly the same cost as rebuilding/replacing drum brakes
  • 11-1/4” diameter, 1” thick vented cast iron rotors dissipate heat faster than drum brakes
  • Serviceable design ensures good drivability and piece-of-mind when on the road
  • Street-friendly GM D154 style pads, replacements available nearly everywhere
  • GM “Metric” style single piston calipers with 7/16”-20 banjo-style inlets
  • Fits Ford “big bearing” 9 inch housings from passenger cars
  • Use with Ford 9 inch rear ends with 2-3/8” or 2-1/2” axle flange-to-housing offsets
  • Dual wheel bolt patterns covering all GM/Ford/Mopar (5x4.5” for 1/2” studs, 5x4.75” for 7/16” studs)
  • Use with 15” or larger disc brake-style wheels
  • Easy bolt-on installation w/ included instruction sheet
  • Includes heavy steel mounting brackets, Grade 8 hardware and nylock nuts (everything you need)
Application This Part Fits
  • "Old-style" big bearing 9" Ford axle
  • "New-style" big bearing 9" 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.

When using with a Currie Axle with an o/d register of 2.795", the rotor is included in this kit with an i/d register of 2.78" and therefore will need to be machined by increasing the hole diameter in the rotor to match the Currie axle spec of 2.795"

Installation Tips
  1. For passenger car axles only, 15” and larger wheels only
  2. Fits 9 inch housing axle offsets of 2-3/8” to 2-1/2” (measured from outside of housing flange to outside of axle flange, not measured out to axle register but only surface where the rotor sits against). Requires “big bearing” housing ends (for a 3.150” O.D. bearing) with 3/8” bearing retainer bolt holes.
  3. Brake rotor has a 2.78” center hole and works with axle shaft flanges no larger than 6-1/4” diameter. If your axle shaft flange exceeds that diameter, you will need machine the flange to decrease the diameter.
  4. 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.
Specs Sold in Quantity Kit Finish Zinc Rotor Diameter 11.25 Inch Caliper Finish Natural Rotor Shape Round Color Natural Hardware Included Yes Parking Brake Provision No Rotor Thickness 1.00 Position Rear Rear Rotor Included Yes Front Spindles Included No Master Cylinder Included No Brake Booster Included No Front Caliper Included No Front Rotor Included No Rear Caliper Included Yes Rotor Type Vented MFG. Part # 91031902 Bolt Pattern 5 on 4.5" | 4.75" Caliper Pistons One Ford Bearing End Style Big Ford (Old/New) & Small Ford Axle Flange Offset 2.36" - 2.50" Notes Works new and old style big bearing Ford 9" using 3/8" retaining bolts. Reviews yes Rated by Dan Lesher on January 11, 2022

Summary: Great

Pros: perfect

Yes, I recommend this product.

yes Rated by Chuck on November 29, 2021

Summary: This product came complete and the u-tube video on how to install were a big help

Yes, I recommend this product.

I would buy this product again Rated by Superbaker on July 19, 2021

Summary: I used this kit on a street rod truck with a 9in. rear it went together very easily and works great

Yes, I recommend this product.

Pretty straight forward. Rated by Rusty coupe on June 09, 2021

Summary: Beings this is an universal kit it takes time to get it shimmed right.

Yes, I recommend this product.

Fits perfect Rated by Huffman on May 02, 2021

Summary: Very intuitive instructions.

Pros: Amazing and simple to install.

Yes, I recommend this product.

Related Items / Suggested Parts Speedway 8 & 9 Inch Ford Disc Brake Conversion Kit w/ E-Brake Dot Braided Stainless Brake Hoses, GM/Ford, 7/16-20 Rear DOT Braided Stainless Brake Hoses, 69-77 GM, 7/16-20 Banjo Brake Fitting Kit, 7/16-20 to -3 AN Tech Support We're here to help before and after your purchase. If you have a question or need assistance with one of our products, please contact us through Messaging and a knowledgeable Speedway Motors team member will be happy to help. 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.
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