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#91031958
$406.99
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Front Position, 11 Inch Rotor Diameter, Natural
Comes as a Kit
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| MFG. Part # | 91031958 |
| Position | Front |
| Wheel Bolt Pattern (in.) | 5x4.75 in. |
| Wheel Bolt Pattern (mm) | 5x120.65 mm |
| Rotor Diameter | 11 Inch |
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855.313.9176Quick and Easy Returns
Return PolicyIn the 60’s and early 70’s, drum brakes were generally considered to be just fine for safely halting a muscle car in traffic. Disc brakes were a luxurious, extra-cost option that often only ended up under performance packages like the Super Sport or Z/28. But as time has marched on, we’ve grown accustomed to our late models with electronically assisted disc brakes on all four corners that will stop on a dime. Meanwhile, a trip across town in that old drum brake equipped Chevelle, Nova, or Camaro is an exercise in constant vigilance and planning ahead for a panic stop. It’s almost enough to take the fun out of the drive.
It doesn’t take much to drastically improve on the 19th century design of those drum brakes, especially in the front. A simple, inexpensive front disc brake upgrade using OE-style components can make a night and day difference when compared to those old, fading drums. That’s where this kit fits in. While there are bigger, more trick brake kits out there, the Speedway Motors ’64-’74 GM Car Front Disc Brake Kits comes with everything you need to ditch the drums and add a disc kit to keep your GM A/F/X body car safe in modern traffic at a price that doesn’t break the piggy bank.
This brake kit comes complete with everything needed to complete the install. That means bearings, seals, brackets, hardware, 11” rotors with 5 on 4-3/4” bolt pattern, ’69-’77 GM calipers, pads, and hoses are all included, saving you all the trips to the parts store to hunt down the nickel and dime parts that can make an install like this a hassle. It’s designed as a direct bolt on to stock disc brake spindles or Speedway Motors stock-style disc brake spindles, part #910-34900. If you’re converting from drum brakes, the original drum brake spindles require that the upper threaded boss be machined to remove approximately .610” and often the hole needs to be drilled and tapped deeper. To skip the hassle and make sure that it’s done right, we recommend purchasing these new disc brake spindles when performing this swap. If you’re after a dropped stance and improved handling, we recommend using our Speedway Motors G-Comp spindles with this brake kit or 91031958D with drilled and slotted rotors.
This kit fits 1964-72 GM A-Body, 1967-69 GM F-Body and 1968-74 X-Body using stock disc brake spindles, aftermarket disc brake spindles, or modified stock drum brake spindles.
We recommend using our brake booster/master cylinder combo, part # 910-31978 with this front disc brake kit. Stock single reservoir 4-wheel drum brake master cylinders don’t have the capacity to supply the proper amount of pressure for front disc brakes. This master and booster kit also includes an adjustable proportioning valve to offer adjustment of the rear line pressure, allowing you to balance the front and rear brakes.
Also note that this kit will NOT work with 14” diameter wheels. There’s just not enough room for these 11” rotors and OE calipers inside a 14” wheel, so 15” or larger wheels that were designed to work with disc brakes must be used.
Application
This kit fits 1964-72 GM A-Body, 1967-69 GM F-Body and 1968-74 X-Body using stock disc brake spindles, aftermarket disc brake spindles, or modified stock drum brake spindles. When converting from drum brakes, the original drum brake spindles require that the upper threaded boss be machined to remove approximately .610” and often the hole needs to be drilled and tapped deeper. Also note that non-Chevy A bodies like Cutlass, GTO, and Skylark sometimes have different sized holes in the spindles. In these cases we recommend new disc brake spindles, part #910-34900.
Charts
910-31958 Instructions (PDF)
Specs
This disc brake kit allows you to use install '69-'72 11" GM midsize rotors and '69-'77 GM midsize calipers on your stock '64-'72 Chevelle disc brake spindles, or on Speedway Motors' new stock replacement spindles (Part number 91034900).
Guides & Documents
| KEY SPECS | |
|---|---|
| MFG. Part # | 91031958 |
| Brand | Speedway Motors |
| Position | Front |
| Wheel Bolt Pattern (in.) | 5x4.75 in. |
| Wheel Bolt Pattern (mm) | 5x120.65 mm |
| Rotor Diameter | 11 Inch |
| Rotor Type | Vented |
| Caliper Pistons | One |
| Caliper Finish | Natural |
| Parking Brake Provision | No |
| Minimum Recommended Wheel Diameter | 15 Inch |
| Rotor Shape | Round |
| Hardware Included | Yes |
| Rotor Style | Plain Face |
| Front Rotor Included | Yes |
| Front Rotor Diameter | 11 Inch |
| Front Caliper Included | Yes |
| Rear Caliper Included | No |
| Front Spindles Included | No |
| Master Cylinder Included | No |
| Brake Booster Included | No |
| Brake Hoses Included | Yes |
| Rear Rotor Included | No |
| Bolt Pattern | 5 on 4.75" |
| Finish | Natural |
| Color | Natural |
| Front Caliper Finish | Natural |
| Front Caliper Piston Quantity | 1 |
| GENERAL | |
| Sold in Quantity | Kit |
| Notes | Includes rotors, backing plates, bearings and seals, calipers, pads, brake hoses, brake tabs, and caliper brackets. |
| Rotor Thickness | 1.05" |
| Stud Diameter | 0.44" |
| Stud Length | 0.8" |
| Thread Pitch | 7/16"-20 |
| Centerline of Holes | 7" |
| Rotor Material Type | Cast Iron |
4.8
97 Reviews
Customers absolutely recommend this product for its excellent quality and easy installation process. They appreciate the complete nature of the kit, finding it cost-effective and well-fitted for various models of cars, particularly older Chevy and Nova models. Despite minor alterations in some instances, the kit's components integrate seamlessly into most setups. A few reviewers also mention the improvement to their vehicles' stopping power, a testament to the kit's functionality. While the instructions could be more detailed, customer satisfaction remains high, with many vowing to repurchase or suggest the kit to others.
4.8
97 reviews
5
83
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Most Liked Positive Review
4.0
Perfect for existing disk rebuild
We used this kit to rebuild the front disc set up on a 72' Monte Carlo that had sat under a carport for over 10 years. The kit was complete and the service was fast. My 16 year old son and his buddy installed it with little supervision. One small bag of parts that I could have gotten at the parts store were missing but Speedway quickly replaced them no problem.
Most Liked Negative Review
3.0
Does not work on some applications
Converting drum to disk on my 1965 Chevy Malibu. Understood that boss needed to be machined, but what was not provided was the two correct sized bolts that hold bottom caliper mount and dust cover to spindle. Bolts provided were a bit big. This would require spindle and steering arm to be drilled to accommodate for bigger bolt. Also top bolt mounting caliper and dust cover to spindle was never mentioned on instructions. This bolt will not fit into stock drum brake spindle without drilling larger and tapping that top hole.
Filter by Ratings
I would by again , still need more parts
5.0
5 months ago
Smitty
Dayton Ohio
Verified
No problems with product
Would Recommend
stunning
5.0
5 months ago
Ben
Israel
Verified
I ordered parts for a 67 Camaro I'm building. This is the first time I've ordered parts from... and I want to mention the professionalism, the reasonable price, and the fast shipping. The parts I ordered fit perfectly, the quality is top notch.
Would Recommend
Great product great parts
5.0
5 months ago
Classic guy
Washington
Verified
Brake kit for perfect and performed great
Would Recommend
I would buy this product again and I'll buy more as well.
5.0
a year ago
Danny
Fayetteville Ark
Verified
I haven't installed it yet but I did open and look at everything. It looks great and I'm so excited. I still have a few more parts to buy from Speedway Motors
Would Recommend
I would buy again
5.0
a year ago
Crazy
Leechburg PA
Verified
Used on a 67 chevelle everything fit and works very well
Would Recommend
Good price
4.0
2 years ago
Thumper
Az.
Verified
This was a good bargain for what you get. Some instructions would have been nice. There were small parts left over that I still don't know where they go, i.e. crush washers and 2 small black clips.
Would Recommend
I would
5.0
2 years ago
Scooter
Brumley Missouri
Verified
. Very good product and easy to assemble made my job fast and my chevelle look amazing
Would Recommend
I would buy this product again.
5.0
3 years ago
Bird dog
Manhattan, Kansas
Verified
Product worked fine after modifying (cutting off a spud).
Would Recommend
I would highly recommend
5.0
3 years ago
Mike
Surprise,AZ
Verified
Completed the front end with ALL new parts. This kit went together super easy and everything for perfectly! Did both sides in a couple hours. I had already purchased the spindles and then this kit a little later. Bled em and in business!
Would Recommend
Yes
5.0
3 years ago
Dennis
Burlington, NC
Verified
Fix great
Would Recommend
Showing 10 of 97 reviews
45 Questions • 14 Answers
How much will this widen the track width? I've seen on your other kits that it widens 3/8 of an inch. Is the 3/8 overall? Or 3/8 per side?
by Taylor
• 6 years ago
1 answer
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Will this kit work with aftermarket drop spindles? Such as heists?
by Novaguy
• 7 years ago
1 answer
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i have a 74 Nova hatchback is this kit all i need to convert to disc for the front if not what else would i need
by dave
• 7 years ago
1 answer
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I have a 1969 Chevy Nova with 4 wheel manual drum brakes. I want front discs, but I don't want power. My cam doesn't make enough vacuum to have power brakes and I don't want to buy anymore parts to make it work. Can I just add the disc brake kit and be done with it?
by Michael
• 7 years ago
1 answer
View Answer
will this kit work with a factory power brake booster on a 63 impala, provided I add a proportioning valve and a dual master cylinder ?
by cheyennesuperman
• 7 years ago
1 answer
View Answer
I'm looking to convert front drum brakes to disc brakes on a 66 chevelle. I already have a power booster and dual master cylinder. Other than this kit and disc spindles, can you recommend the number for the proportioning valve I will need?
by David
• 8 years ago
1 answer
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I had a rotor get eat up what car can the parts house look up for another rotor?
by Skylark
• 8 years ago
2 answers
View Answers
Will the steering arm mounting holes need to be enlarged in order to fit the larger bolt size?
by Greg
• 8 years ago
1 answer
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Will this kit with the new spindles that you recommend move the tires from there original position outward or inward if converting from original drum brakes on a 65 Chevelle and if so what distance?
by Greg
• 8 years ago
4 answers
View Answers
Will this kit fit on the poem drum spindles ?
by Greg
• 8 years ago
1 answer
View Answer
10 of 45 questions shown
1965-1967 Buick Gran Sport
1964-1972 Buick Skylark
1964-1969 Buick Special
1967-1969 Chevy Camaro
1964-1972 Chevy Chevelle
1964-1968 Chevy Chevy II
1964-1972 Chevy El Camino
1964-1967 Chevy Malibu
1970-1972 Chevy Monte Carlo
1969-1974 Chevy Nova
1964-1971 Oldsmobile 442
1964-1972 Oldsmobile Cutlass
1964-1972 Oldsmobile F85
1967-1969 Pontiac Firebird
1964-1972 Pontiac GTO
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1964-1970 Pontiac Tempest
