Modern Stopping Power: This complete 11" disc brake kit upgrades 1964-1/2 to 1969 Mustangs with advanced braking efficiency, surpassing the performance of original drum brakes., Comprehensive Kit Features: Includes 11" cast iron rotors, loaded metric calipers, slide bolts, brake hoses, and all necessary seals, bearings, and hardware for a full conversion., Bolt-On Convenience: Designed for easy installation on factory V8 front drum brake spindles, this kit offers a straightforward, bolt-on solution, compatible with both manual and power assist systems., Wheel Compatibility: Engineered to work with a minimum 15" wheel, ensuring that modern disc brake technology fits seamlessly into your vintage Mustang., Enhanced Safety and Performance: Dramatically improves braking capabilities for 1964-1/ 1964-1969 Ford Mustang Economy Bolt-On Disc Brake Kit Sku # 91664094 Mfr. Part # 91664094 Condition New Brand Speedway Motors Sold Kit Details Info
- Fits 1964-1969 V8 drum brake spindles with no modifications
- Works with manual or power assist braking systems
- Features 11-inch diameter vented disc brake rotors with Ford 5x4-1/2 bolt pattern
- Uses popular GM “Metric” single piston disc brake calipers
- Includes street “soft” compound organic D154 brake pads
- Requires a minimum of a 15-inch diameter wheel for caliper clearance
- Complete “at the wheel” drum to disc brake conversion kit for your vintage Mustang
- In-house designed and manufactured caliper adapter brackets
- All bearings, seals, brake hoses, and mounting hardware included
Ditch Those Sketchy Drum Brakes on Your ’64-’69 Mustang and Convert to Disc Brakes
The first generation Mustang, specifically the 1964-1/2 to 1969 model years, are extremely popular rides. From basic cruisers to major pro touring style or restomod builds, these vintage Mustangs are sought out by many enthusiasts. Be it a hardtop, fastback, or convertible, there is a fan somewhere handing over their hard earned cash for those Mustang car keys only to have their bubble burst on that first drive home. Yes, these early Mustangs are popular, but their handling, braking, and comfort have not aged as well as the Mustang’s overall exterior looks have.
The Mustang came from the factory with manual drum brakes at all four corners. There was an option for power drum brakes, which helped with pedal feel a bit, and there also was an option for manual-only disc brakes, but very few Mustangs saw these options. So, many of the Mustangs out there you’ll find are still running the factory manual drum brakes. There are several problems with front drum brakes. While some will argue that a drum brake will have more surface area than a disc brake (which is indeed often true), the drum brake is much more susceptible to water intrusion. This can create a severe brake pull when the brakes are applied after driving through standing water or in hard rain. There’s no worse feeling than stepping on the brake pedal and your vintage Mustang changes lanes for you!
Drum brakes also do not shed heat efficiently. The large cast iron drum stores the heat energy given off the brake shoes when the car is slowed since there is no air circulation to speak of inside the drum. This means drum brakes for any sort of performance driving will overheat and fade quickly. Of course, we’d be remiss in mentioning that drum brakes have more moving parts and are more complicated than a simple floating caliper disc brake setup. Many a weekend wrench have tried to rebuild their drum brakes only to get the shoes on backwards (yes, there is a primary and secondary shoe), install the shoe return springs improperly, and several other things to watch out for when rebuilding drum brakes. Upgrading to the best Mustang disc brake conversion kit you’ll find for the money eliminates all these problems while saving you money.
An Easy to Install Disc Brake Conversion Kit That Fits Your Original Drum Brake Spindle
Many front drum to disc brake conversions require a specific disc brake spindle or they make you grind/modify your factory spindle in some way. Our Mustang drum to disc brake conversion kit uses adapter brackets made from 1/4-inch A36 steel plate we’ve designed in-house and then zinc plated for corrosion resistance to create a true bolt-on disc brake solution using your original V8 Mustang’s drum brake spindles. There is nothing to grind, notch, drill out, or otherwise modify on your OEM V8 spindles. As a matter of fact, you don’t need to remove the spindles or touch any of your Mustang’s front suspension for this disc brake upgrade. Installation is basic ratchet and wrench work that can be completed in an hour or so. The only tough part, if you want to call it that, is adapting your factory brake lines to the kit’s brake hoses, as you may need to relocate or shorten the brake hard lines depending on how you route and mount your front brake hoses and brackets included in the kit.
Once you’ve installed our caliper adapter brackets to your stock spindles it is simply a matter of packing wheel bearings and installing the rotor onto the spindle pin, followed by mounting the calipers onto the caliper brackets. Finish the job with a and an adjustable . Or upgrade to power brakes while you’ve got the toolbox open by using either our or power brake conversion kits that include power booster, master cylinder, and proportioning valve with pre-bent brake lines.
11-inch Disc Brakes for Not Much More Than a Full Drum Brake Rebuild—That’s Value!
If you start adding up everything you would need to fully rebuild your Mustang’s stock front drum brakes from the backing plates out (shoes, hardware, wheel cylinders, bearings, seals, brake drum, and new brake hoses) you’re not that far off from the cost of this 11-inch vented disc brake conversion with single piston caliper. It’s a great disc brake conversion kit for street use. The vented cast iron rotors easily shed heat generated under heavy braking. Meanwhile, the GM “Metric” caliper has become so popular in street and motorsports use we’ve cast our own version and made minor changes for strength and fitment. Plus, the industry standard these calipers use allow you to easily upgrade to more aggressive brake compounds if you wish to do so.
While a great value that will provide ample stopping power for your V8 Mustang, this kit does require for adequate clearance of the caliper’s mounting position. Most likely you have a nice set of wheels in mind for an upgrade or your Mustang is already running 15-inch or larger wheels so this requirement shouldn’t pose a problem unless you’re wishing to stick with the factory 14-inch wheels. If you’re looking for a more “correct” drum to disc brake conversion for your vintage Mustang we do offer the traditional that was the factory option on 1965-1966 Mustangs.
A drum to disc brake conversion kit that dramatically upgrades your vintage Mustang’s braking abilities while leaving your wallet intact for other upgrades or repairs on your Mustang. Isn’t that what we all want? A great product at a great price that takes our project car budget further. Upgrade your Mustang’s brakes today and know you’ll be safer on the road no matter what the traffic or weather conditions throw at you.
Installation Tips
- Installation may require minor rerouting, bending, or shortening of stock front brake hard lines on vehicle
- Highly recommend using a dual-bowl disc/drum master cylinder with this disc brake kit
- Requires minimum 15-inch diameter wheels for proper clearance
- Note that the bearing races come pre-installed in the disc brake rotors
Specs Sold in Quantity Kit Bolt Pattern 5 on 4.5" Rotor Diameter 11 Inch Minimum Recommended Wheel Diameter 15 Inch Caliper Finish Natural Rotor Shape Round Rotor Style Plain Face Spindle Type Factory Drum Spindle Rotor Finish Natural Bracket Material Steel Color Natural Thread Pitch 1/2-20 Hardware Included Yes Parking Brake Provision No Bracket Included Yes Stud Length 1.29 Stud Diameter .50 Bore Size 2.38 Rotor Thickness .88 Position Front Front Rotor Style Plain Face Front Caliper Finish Natural Front Rotor Included Yes Front Caliper Included Yes Rear Rotor Included No Front Caliper Piston Quantity One Rear Caliper Included No Front Spindles Included No Master Cylinder Included No Brake Booster Included No Brake Hose Material Rubber Brake Hoses Included Yes Rotor Type Vented Front Suspension Type IFS Wheel Diameter 15 Inch Rotor Material Type Cast Iron Bearings Included Yes Caliper Pistons One Brake Pads Included Yes Front Rotor Diameter 11 Inch Intended for Street Use Yes Notes Recommend dual-bowl disc/drum master cylinder with installation of this disc brake conversion Bracket Color Zinc plated MFG. Part # 91664094 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.
