Description: Disc brake stopping power for Ford 9 inch rearends at nearly the same cost as rebuilding/replacing drum brakes, Kits include two bolt-on caliper brackets, two 11 1/4" vented rotors, two GM metric emergency brake style calipers, brake pads and hardware, Rotors have a 2.780" center hole with both 5 on 4 1/2" and 5 on 4 3/4" bolt circles, Fits over an axle with maximum flange diameter of 6 1/4" O.D., 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" Ford 9 Inch Bolt-On Rear Disc Brake Kit w/ E-Brake Caliper Sku # 91031921 Mfr. Part # 91031921 Condition New Brand Speedway Motors Sold Kit Details Info As featured on Classic Truck’s Week to Wicked. Watch the transformation ! 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 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 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, Grade 8 hardware and nylock nuts (everything you need) Included in this Kit: (2) 11-1/4 Inch Rear Brake Rotor (1) GM Metric Disc Brake to 9 Inch Ford Bracket Set (1) Ford 9 Inch Brake Bolt Kit (1) 1978-Up GM Metric Emergency Brake Caliper, LH, 5.45 Mount Bolts (1) 1978-Up GM Metric Emergency Brake Caliper, RH, 5.45 Mount Bolts (1) Instruction Sheet 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" Check out our on the Toolbox for more tips on this brake kit. Charts (PDF) (PDF) Installation Tips For passenger car axles only, 15” and larger wheels only 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. 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. Brackets position the calipers in a rear-mid orientation (3 o’clock on the driver side rear wheel), making this ideal for pull-type emergency brake cable systems (most OEM systems work in this way). 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. This kit will only fit 8" Ford housings with big ford bearings. Specs Sold in Quantity Kit Finish Natural Rotor Diameter 11.25 Inch Minimum Recommended Wheel Diameter 15 Inch Caliper Finish Natural Rotor Shape Round Color Natural Thread Pitch 7/16"-20 Hardware Included Yes Parking Brake Provision Yes Rotor Thickness 1.00 Rotor I.D. 2.78 Rotor Backspace 2.30 Position Rear Rear Rotor Included Yes Front Spindles Included No Master Cylinder Included No Brake Booster Included No Notes Works with 8" Ford, and new and old style big bearing ford 9" using 3/8" retaining bolts. Front Caliper Included No Front Rotor Included No Rear Caliper Included Yes Rotor Type Vented Rotor Material Type Cast Iron MFG. Part # 91031921 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" Reviews I would definitely buy the product again in future rebuilds Rated by Mike on June 25, 2021 Summary: The product was exactly what I wanted. Yes, I recommend this product. Great product would buy again Rated by Mike on June 25, 2021 Summary: Fitted perfectly Yes, I recommend this product. Yes I would buy this again Rated by Stephen White on May 26, 2021 Summary: The kit worked out great. Everything was there to get it installed Yes, I recommend this product. yes Rated by OLD fart on January 19, 2021 Summary: I have a Ford 9" housing cut to 49" and centered , old style ,Big Ford . The problem came because I used cut to fit axles/with bearing on .I knew I needed to turn the hole in the rotor -OK , but I did not expect the bearing retainers not to work , so I had to lath a shim to space the retainer for the bearing clearance. The company should provide ( 4 shims) min. To solve the bearing problem . other than that its a great product . Yes, I recommend this product. i would recommend to an friend Rated by hgwayman on December 29, 2020 Summary: work great Yes, I recommend this product. Related Items / Suggested Parts Banjo Brake Fitting Kit, 7/16-20 to -3 AN Dot Braided Stainless Brake Hoses, GM/Ford, 7/16-20 Rear Speedway 8 & 9 Inch Ford Disc Brake Conversion Kit w/ E-Brake DOT Braided Stainless Brake Hoses, 69-77 GM, 7/16-20 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 eBay 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.
Price: 391.99 USD
Location: Lincoln, Nebraska
End Time: 2024-03-27T18:01:53.000Z
Shipping Cost: 0 USD
Product Images
Item Specifics
Return shipping will be paid by: Buyer
Returns Accepted: Returns Accepted
Item must be returned within: 60 Days
Refund will be given as: Money Back
Return policy details:
Brand: Speedway Motors
Type: Disc Brake Kits
Manufacturer Part Number: 91031921
Finish: Natural
California Prop 65 Warning: False