Product Summary

Ford 8 Inch, Ford 9 Inch, Rear Position, Natural

  • Incomplete
  • This product is missing one or more items for complete installation, such as hardware, gaskets, etc
  • Disc brake stopping power at nearly the same cost as rebuilding/replacing drum brakes
  • This kit is unique in that it provides all the brackets and flanges that fit the three most popular sizes of the Ford 9 inch & 8 inch rear ends
  • Provides an easy to install, bolt on solution for upgrading your pre-1980 Ford passenger car 9 inch rear-end to disc brake performance
  • Application is for (3-3/8" x 2" Small Ford Style, 3-1/2" x 2-3/8" Big Ford Old Style, & 3-9/16" x 2" Big Ford New Style) housing flange
  • When converting to 4 wheel disc brakes you will need a disc/ disc proportioning valve and larger bore master cylinder to get the right ratio and fluid to those rear calipers

Key Specs

MFG. Part #91664083
Garage Sale TypeIncomplete
Rotor Diameter11 Inch
Rotor TypeVented

Need To Know

This Product Will Ship Free

Shipping Policies & FAQs

Ineligible for Return

Contains items that cannot be returned


Garage Sale Product

This is Garage Sale priced because it is missing one brake caliper.


Value-Packed, Complete Disc Brake Solution

This complete, yet economical disc brake kit for Ford 9 inch and 8 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 with a 2.5” bore size. The integrated emergency brake lever makes parking brake setup a breeze for any vehicle. These calipers were originally found on 1979-85 GM E-Bodies (Eldorado/Riviera/Toronado) and 1980-85 GM K-Bodies (Cadillac Seville). 

Large 11” 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. Rubber flex lines with matching banjo bolts, e-brake cables and frame tabs/clips are included to finish out the installation. 

Fits Ford 9 Inch and 8 Inch Housings

This rear disc brake kit fits Ford 8” 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.

  • Disc brake stopping power at nearly the same cost as rebuilding/replacing drum brakes
  • 11” 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
  • Integrated parking brake for a feature-complete brake system
  • Brackets position the caliper in a rear-mid orientation, ideal for pull-type E-brake cables
  • Fits Ford “big bearing” 9 inch housings from passenger cars and 8 inch rear ends
  • 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
    • E-brake cables rubber brake hoses with matching banjo bolts 
    • Frame tabs and clips for hoses
    • Grade 8 hardware and nylock nuts (everything you need)






MFG. Part #91664083
BrandSpeedway Motors
Garage Sale TypeIncomplete
Rotor Diameter11 Inch
Rotor TypeVented
Bolt PatternDual: 5 on 4.5" | 4.75"
Caliper PistonsOne
Caliper FinishNatural
Parking Brake ProvisionYes
Minimum Recommended Wheel Diameter15 Inch
Rotor Thickness1"
Rotor ShapeRound
Hardware IncludedYes
Sold in QuantityKit
Rotor StylePlain Face
Front Rotor IncludedNo
Front Rotor Diameter11 Inch
Front Caliper IncludedNo
Front Caliper Piston Quantity1
Front Caliper FinishNatural
Rear Caliper IncludedYes
Front Spindles IncludedNo
Master Cylinder IncludedNo
Brake Booster IncludedNo
Application TypeDisc/Disc
Brake Hose MaterialRubber
Brake Hoses IncludedYes
Rear Rotor IncludedYes