Products to Compare (max of 3)
X
Compare These Parts
ALWAYS SECURE
America's Oldest Speed Shop ® Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Filters
Menu
Help Center
Help Center
x
Help Center

U.S.Order Line:

800.979.0122

(CST) 7am - 10pm

Race and Rod Tech Support

Mon-Fri 8am - 5pm

Canadian Order Line:

855.313.9180

International Order Line:

1.402.323.3200
Since 1952
Menu
x

Mustang II Complete 11 In Front Disc Brake Kit, 5 x 4-3/4 GM BP

Free Shipping Free Shipping
Specs
Sold in Quantity:
Kit
Bolt Pattern:
5 on 4.75"
Finish:
Natural
Rotor Diameter:
11.00
Caliper Finish:
Natural
Rotor Construction:
Vented
Material Type:
Cast Iron
Caliper Pistons:
Single
Rotor Location:
Front
Rotor Shape:
Round
Thread Pitch:
7/16"-20
Hardware Included:
Yes
Drilled:
No
Slotted:
No
Centerline of Holes:
7.00
Stud Length:
.80
Stud Diameter:
.44
Rotor Thickness:
1.05
Notes
Includes rotors, bearings and seals, calipers, pads, brake hoses, brake tabs, and caliper brackets.
Mustang II Complete 11 In Front Disc Brake Kit, 5 x 4-3/4 GM BP
Mustang II Complete 11 In Front Disc Brake Kit, 5 x 4-3/4 GM BP
VIDEO
Mustang II Complete 11 In Front Disc Brake Kit, 5 x 4-3/4 GM BP

Click image to enlarge

Please note the following about this product:

  • This item is sold as a kit.

Details

Reviews (12)

Q & A (12)

What's in the Box

Info

Easily upgrade your Mustang II based suspension from the stock 9-1/4" rotors to 11" rotors with powerful single piston GM midsize floating calipers. Kit requires no machining. For use on 1974-1980 Pinto, Bobcat and Mustang II factory spindles. 

GM bolt pattern 5 on 4-3/4" (increases track width 1" per side). Includes two 16" front brake hoses and 7/16"-20 banjo bolts with crush washers.

910-31943 Instructions (PDF)

Notes

Note:  When the caliper bracket is affixed to the spindle properly so that the bracket is square to the spindle and brake rotor face for proper caliper alignment and installation, the welded roid that features female threads in the caliper bracket will be offset inboard or towards the centerline of the vehicle in relation to the centerline of the caliper bracket plate.

Customer Reviews

Rated 4.8 out of 5 by 12 reviewers.
RATING BREAKDOWN
12 reviews
5 Stars
10
4 Stars
2
3 Stars
0
2 Stars
0
1 Star
0
RECOMMEND THIS PRODUCT:

motorhead dan
dayton ohio

top of line brake kit

August 12, 2016
ever thing bolts right up after install bleed brake a better brake than I ever had I upgraded from 9 inch rotors to 11 inch rotors thank you speedway motors for great product
Pros:
  • Fits Perfect
Cons:
  • None
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

signmandan
Verified Purchaser
Texarkana, TX

Quality Parts

July 19, 2016
Have used the Speedway products on the last 6 vehicles we have built. From the cross members, rear spring set ups to the front end parts. It works, no failures. It comes with understandable instructions.
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Bj fowler
Verified Purchaser
Verified Reviewer
Covington Ga.

speedway motors you guys rock and i would highly recommend

May 10, 2016
great
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Keith1950
Florida, USA

Great Complete Kit

September 11, 2013
This is a great kit and worked fine with the Mustang II suspension on my ??_50 Chevy Coupe. A few things to note that might help if you're contemplating buying this kit or are getting ready to install it. - The stock ??_50 Chevy steel wheels will fit. - If you don??_t have a race tool or press??_ Use the Chevy races that you knocked out of the rotors to drive the new Ford races in. (it would be nice if Speedway did this but it would no doubt add to the price) Then drive the Ford races in until they seat, the Chevy race will now be stuck, just knock it out from the back, ??_easy - The seals are ??_special??_, you cannot get them at your local auto parts store, order 2 more to have in the future or if you mess them up during installation. - Installing the seals??_ They are a tight fit and could be messed up easily. Use your bench grinder??_s wire wheel (or equivalent) to remove all of the paint on the outside of the seal. This will make installation much easier. I used a piece of 4X4 to drive seal in, worked great. - Chase the threads on the caliper brackets, there seemed to be some plating build-up or something in there. All in all this is a great kit for the money.
Pros:
  • everything you need is included
Cons:
  • you have to change the races in the rotors
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Mike6147
Kent, OH, USA

Great Kit. Simple, complete, just great

March 24, 2013
This was the first conversion I have done, and it was easy and straight forward. Make sure you read all the directions ahead. The rotors need the Ford races pressed in. I had a greasy mess.
Pros:
  • straight forward easy complete
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Ace
Verified Purchaser
Gautier, Ms

Great, I would recommend to a friend

August 19, 2012
Item was as described in add and by salesperson. Easy installation of the item on the Pro Street frame for my 41 Willys Coupe (Street Beast kit). Still in the building stage so I have not had a chance to see how it performs
Pros:
  • Easy To Install
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Den
Verified Purchaser
Potosi, Mo

Very good product at a good price.

January 27, 2012
The brake upgrade is for a project car I'm still working on so I don't know about the performance yet. The parts loook great though.
Pros:
  • Project car sill working
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

vwman
washington state

outstanding brake set up , fit great

January 09, 2012
this is a great complete kit, was really easy to install and comes with good instructions. everything in the kit looked like quality heavy duty stuff! was very happy with it.
Pros:
  • Easy To Install
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

vwman
washington state

outstanding brake set up , fit great

January 09, 2012
this is a great complete kit, was really easy to install and comes with good instructions. everything in the kit looked like quality heavy duty stuff! was very happy with it.
Pros:
  • Easy To Install
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Nate
Marshfield, WI

Excellent Kit, very affordable

December 06, 2011
Perfect for my mustang 2 upgrade, Street Rod in progress, 50 Chev Truck
Pros:
  • Easy To Install
Yes, I recommend this product.
Full Size Image

Was this review helpful? 0 0

Page 1 of 2

Product Q&A

12 questions : 13 answers

1 answers

rotor part number What is the part number for the rotor only?

enen
January 11, 2013

rotor part number What is the part number for the rotor only?

Answers

January 11, 2013
Jason
This kit uses 1969-72 GM rotors, Speedway part #91065390
1 answers

hub dimensions with stock Mustang 2 spindles are hub dimensions available? i need to know the distance from Wheel Mating Surface to upper and lower ball joint center line or some reference point i can use to see how this setup with work in my project car thank you

enen
January 08, 2013

hub dimensions with stock Mustang 2 spindles are hub dimensions available? i need to know the distance from Wheel Mating Surface to upper and lower ball joint center line or some reference point i can use to see how this setup with work in my project car thank you

Answers

January 08, 2013
Jason
Hub face to hub face on the stock Mustang II suspension with 9 ½” rotors is 56 ½”. Going to the Speedway 11” rotor kits increases the track width to 57.5” for the Ford 4 ½ bolt pattern or 58.5 for the 4 ¾” Chevy bolt pattern. Another option to keep the track width at the 56 ½” is to use the SSBC brake kit with the 11” rotors under part number 28614836 in choice of caliper finishes
1 answers

does this move the track width out

willys
December 14, 2012

does this move the track width out

Answers

December 14, 2012
Jason
Brake kit #91031943 will increase the track width 1" per side over the stock Mustang II components. Overall track width is 2" wider
1 answers

what is the minimum reccomended brake master cylinder bore size for these brakes?

September 04, 2011

what is the minimum reccomended brake master cylinder bore size for these brakes?

Answers

September 06, 2011
Jason
A 1" master cylinder is the recommended size
1 answers

I have this Kit,on my MustangII front end, I want to put the Drop on, Which 2" drop spindles work with this Caliper kit ? Brakets ? thanks

Texas
August 28, 2011

I have this Kit,on my MustangII front end, I want to put the Drop on, Which 2" drop spindles work with this Caliper kit ? Brakets ? thanks

Answers

August 29, 2011
John
This kit will work with our 2” dropped spindles number 91034304. You may need to alter the angle of the brake lines off the caliper for additional clearance but the rest will be a direct bolt on to the 74-78 Mustang II style front end.
2 answers

Will this kit work with 14" wheels?

January 03, 2011

Will this kit work with 14" wheels?

Answers

April 30, 2011
rotorbolt
It will fit SOME 14" wheels but not all. Most aftermarket 14" rims will clear. Will not clear GM 60's and early 70's era 14" factory steel rims that were typically used for drum brakes. Late 70's- early 80's GM "G" body (malibu) and S10 14" steel rims will clear however.
January 05, 2011
Pat
This kit should work with 14” wheels it will also widen your track width approx 1” per side for a total track width increase of approx 2 “
1 answers

Will this fit on your 2inch dropped spindle

Olhusker
PA
May 29, 2015

Will this fit on your 2inch dropped spindle

Answers

June 01, 2015
Eric
Expert
Yes this brake kit will fit our 2" drop Mustang II spindle 91034304.
1 answers

What is the piston size of this G.M. midsize caliper ?

35olds
Sidney , Ohio
August 26, 2015

What is the piston size of this G.M. midsize caliper ?

Answers

September 02, 2015
Eric
Expert
GM midsize calipers such as the calipers in this kit are a 2.812" OD piston.
1 answers

Is this kit available with 5 on 4.5 bolt pattern?

Ron
Starke, FL
September 23, 2015

Is this kit available with 5 on 4.5 bolt pattern?

Answers

September 24, 2015
Eric
Expert
We offer kit number 91031944 for Mustang II spindles which has 5 on 4 1/2" bolt pattern.
1 answers

I have a older mustang ll front end set up with drum brakes on front with a 4.5 5 bolt chevy pattern. I used the drum brakes only for mocking up the frame set up. My question is i need info for what disk brake kit with spindles would i need to switch to disk brakes,i do like the speedway kits but not sure on which kit to make the swap.i also think its a 1974 and up front end setup. The car has 15 inch rims also thanks for the help.

Kevin
Portsmouth virginia
October 15, 2015

I have a older mustang ll front end set up with drum brakes on front with a 4.5 5 bolt chevy pattern. I used the drum brakes only for mocking up the frame set up. My question is i need info for what disk brake kit with spindles would i need to switch to disk brakes,i do like the speedway kits but not sure on which kit to make the swap.i also think its a 1974 and up front end setup. The car has 15 inch rims also thanks for the help.

Answers

October 20, 2015
John
Expert
If the overall height of your spindle is 7 5/8" from the top where the ball joint goes in to the bottom side where the lower ball joint goes in then your spindles are the 74 and up. The 5 on 4.5" is the Ford bolt pattern measured from the outside of one stud, skip one stud, and to the center of the second stud. If it is 4 3/4" then kit number 91031950 would be suggested. If a 4 1/2" then kit number 91031944.
Page 1 of 2

You may also be interested in:

  • Mustang II Complete 11 Inch Brake Kit, Ford 5 x 4-1/2 Bolt Pattern
    Mustang II Complete 11 Inch Brake Kit, Ford 5 x 4-1/2 Bolt Pattern
    View
    (18)
    $254.99
    Compare
  • Hawk HB103H.590 Performance 1969-1977 GM HPS Brake Pads
    Hawk HB103H.590 Performance 1969-1977 GM HPS Brake Pads
    View
    (3)
    $56.99
    Compare
  • DOT Braided Stainless Brake Hoses, 1978-88 GM, 10mm-1.5
    DOT Braided Stainless Brake Hoses, 1978-88 GM, 10mm-1.5
    View
    (17)
    $49.99
    Compare
  • Wilwood 140-1013-B Drag Front Brake Kit for 1971-80 Pinto/Mustang II
    Wilwood 140-1013-B Drag Front Brake Kit for 1971-80 Pinto/Mustang II
    View
    (0)
    $631.99
    Compare
  • Wilwood 140-11017 FDL 11 Front Disc Brake Kit, 74-80 Pinto/Mustang II
    Wilwood 140-11017 FDL 11 Front Disc Brake Kit, 74-80 Pinto/Mustang II
    View
    (0)
    $687.99
    Compare
  • Gorilla Automotive LN41178 Chrome Acorn Lug Nut, 7/16 Inch Thread
    Gorilla Automotive LN41178 Chrome Acorn Lug Nut, 7/16 Inch Thread
    View
    (8)
    $0.99
    Compare
  • Mustang II Complete 11 In Front Disc Brake Kit, 5 on 4-3/4, Granada
    Mustang II Complete 11 In Front Disc Brake Kit, 5 on 4-3/4, Granada
    View
    (6)
    $254.99
    Compare
  • Gorilla Automotive 73671N 7/16-20  Mag Wheel Locks, 3/4 In Shank
    Gorilla Automotive 73671N 7/16-20 Mag Wheel Locks, 3/4 In Shank
    View
    (0)
    $18.99
    Compare
  • Gorilla Automotive 41773 Wheel Installation Kit, 7/16 Inch
    Gorilla Automotive 41773 Wheel Installation Kit, 7/16 Inch
    View
    (0)
    $39.99
    Compare
  • Gorilla Automotive 70077B 7/16 Inch-20 Open Rally Wheel Style Lug Nuts
    Gorilla Automotive 70077B 7/16 Inch-20 Open Rally Wheel Style Lug Nuts
    View
    (2)
    $3.99
    Compare
  • Gorilla Automotive 73077B 7/16 In-20 Open Mag Wheel Lugs 3/4 In Shank
    Gorilla Automotive 73077B 7/16 In-20 Open Mag Wheel Lugs 3/4 In Shank
    View
    (0)
    $7.99
    Compare
  • Gorilla Automotive 73177B 7/16 In-20 Std Mag Wheel Lugs 3/4 In Shank
    Gorilla Automotive 73177B 7/16 In-20 Std Mag Wheel Lugs 3/4 In Shank
    View
    (0)
    $7.99
    Compare
  • Gorilla Automotive 90077B 7/16 In-20 Tall Acorn Lug Nuts, 60 Deg Taper
    Gorilla Automotive 90077B 7/16 In-20 Tall Acorn Lug Nuts, 60 Deg Taper
    View
    (2)
    $5.99
    Compare
  • Wilwood 120-10937 D52 Dual Piston Floater Caliper, 2 Piston/1.04 Disc
    Wilwood 120-10937 D52 Dual Piston Floater Caliper, 2 Piston/1.04 Disc
    View
    (0)
    $164.99
    Compare
  • Wilwood 120-10937-BK D52 Dual Piston Floater Brake Caliper, Black
    Wilwood 120-10937-BK D52 Dual Piston Floater Brake Caliper, Black
    View
    (0)
    $164.99
    Compare
  • Wilwood 120-10937-RD D52 Dual Piston Floater Caliper, 2.00 / 1.04 Inch
    Wilwood 120-10937-RD D52 Dual Piston Floater Caliper, 2.00 / 1.04 Inch
    View
    (0)
    $164.99
    Compare
  • Wilwood 140-11017-D FDL Front Disc Brake Kit, 1974-80 Pinto/Mustang II
    Wilwood 140-11017-D FDL Front Disc Brake Kit, 1974-80 Pinto/Mustang II
    View
    (0)
    $787.99
    Compare
  • Wilwood 140-11017-DP FDL Front Disc Brake Kit, 74-80 Pinto/Mustang II
    Wilwood 140-11017-DP FDL Front Disc Brake Kit, 74-80 Pinto/Mustang II
    View
    (0)
    $882.99
    Compare
  • Wilwood 140-11017-DR FDL Front Disc Brake Kit, 74-80 Pinto/Mustang II
    Wilwood 140-11017-DR FDL Front Disc Brake Kit, 74-80 Pinto/Mustang II
    View
    (0)
    $879.99
    Compare
  • Wilwood 140-11017-P FDL Front Disc Brake Kit, 1974-80 Pinto/Mustang II
    Wilwood 140-11017-P FDL Front Disc Brake Kit, 1974-80 Pinto/Mustang II
    View
    (0)
    $779.99
    Compare
  • Wilwood 140-11017-R FDL Front Disc Brake Kit, 1974-80 Pinto/Mustang II
    Wilwood 140-11017-R FDL Front Disc Brake Kit, 1974-80 Pinto/Mustang II
    View
    (0)
    $772.99
    Compare
  • Wilwood 290-0632 570 Brake Fluid, 12 oz Bottle
    Wilwood 290-0632 570 Brake Fluid, 12 oz Bottle
    View
    (3)
    $9.99
    Compare
  • Red Line 80402 CV-2 Synthetic Grease
    Red Line 80402 CV-2 Synthetic Grease
    View
    (0)
    $12.99
    Compare
  • Mustang II IFS Front Suspension Kits Without Brakes
    Mustang II IFS Front Suspension Kits Without Brakes
    View
    (0)
    $924.99
    Compare
Suggestions