Product Summary

Front Position, 11 Inch Rotor Diameter, Natural

  • Upgrade your Mustang II from the stock 9 1/4" rotors to 11" rotors with powerful single piston floating caliper
  • Simple bolt-on conversion includes instructions & requires NO machining
  • For use on '74-'80 Pinto or Bobcat and '74-'78 Mustang II spindles
  • Complete kit includes new rotors, calipers, rubber brake hoses, brackets, bearings, seals, pads and hardware
  • GM bolt pattern 5 on 4-3/4" (increases track width 1/2" per side)

Comes as a Kit

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Key Specs

MFG. Part #91031950
PositionFront
Wheel Bolt Pattern (in.)5x4.75 in.
Wheel Bolt Pattern (mm)5x120.65 mm
Rotor Diameter11 Inch
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Need To Know

Quick and Easy Returns

Return Policy

Speedway Motors 91031950 Details

Easily upgrade your Mustang II based suspension from the stock 9-1/4" rotors to 11" rotors with powerful single piston GM Metric style 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 1/2" per side)
  • Includes two 16" front brake hoses and 7/16"-20 banjo bolts with crush washers
  • Granada style rotors

Charts

Speedway Motors 91031950 Specifications

KEY SPECS
MFG. Part #91031950
BrandSpeedway Motors
PositionFront
Wheel Bolt Pattern (in.)5x4.75 in.
Wheel Bolt Pattern (mm)5x120.65 mm
Rotor Diameter11 Inch
Rotor TypeVented
Caliper PistonsOne
Caliper FinishNatural
Parking Brake ProvisionNo
Minimum Recommended Wheel Diameter15 Inch
Rotor ShapeRound
Hardware IncludedYes
Rotor StylePlain Face
Front Rotor IncludedYes
Front Rotor Diameter11 Inch
Front Caliper IncludedYes
Rear Caliper IncludedNo
Front Spindles IncludedNo
Master Cylinder IncludedNo
Brake Booster IncludedNo
Brake Hoses IncludedYes
Rear Rotor IncludedNo
Bolt Pattern5 on 4.75"
FinishNatural
ColorNatural
Front Caliper FinishNatural
Front Caliper Piston Quantity1
GENERAL
Rotor Thickness0.88"
Stud Diameter0.43"
Stud Length0.88"
Centerline of Holes5.5"
Rotor Material TypeCast Iron

Ratings & Reviews

4.8

22 Reviews

Overall Assessment

Customers appreciate the product for its quality, easy installation and accurate fit. Its compatibility with GM bolt patterns and use on various car models like Chevy and Ford was highly noted. Users stated that the system improves braking, effectively upgrading from previous setups. Some customers also highlighted minor issues like the need for slight modifications during install and smaller cotter pin size but overall, they expressed satisfaction and intent to repurchase. Comparing it with competitors, customers deemed it a good value for money, even favorably mentioning the helpfulness of tech support.

4.8

22 reviews

5

17

4

5

3

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2

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1

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Excellent products that works well

5.0

5 months ago

Sneaky Rican

Cincinnati, Ohio

Verified

This front brake kit fits precisely on the Speedway bolt in front suspension MII , eliminating any unnecessary problems

Would Recommend

yes

5.0

6 months ago

JIM

Hartselle Al

Verified

it all fit and worked great

Would Recommend

Mustang II metric disk brake conversion.

5.0

10 months ago

DJ

Navarre, FL.

Verified

Everything fit perfectly.

Would Recommend

I would recommend Speedways brake kits for Hot rods anytime

5.0

a year ago

Chet

VA.

Verified

The kit is a good quality kit and makes the job finished with ease. great for a street rod upgrade.

Would Recommend

yes I would buy again.

4.0

3 years ago

Double D

clearfield utah

Verified

Cotter pin size to small.

Would Recommend

Good fit and easy install

5.0

3 years ago

Craliuga

Big Lake, MN

Verified

Product fit very well and install is very simple and straight forward. Nice that is has the GM bolt pattern to match up with my wheels.

Would Recommend

Great quality

5.0

6 years ago

Scott

San Diego, Ca

Verified

Fit perfectly

Would Recommend

I would buy again

5.0

7 years ago

Bruce

Charleston WV

Verified

Parts fit exactly as described. Shipping was fast.

Would Recommend

excellent product everything fit perfect

5.0

7 years ago

no nickname

plymouth mass 02360

Verified

everthing went well no problems except my own I called text linebecause my brake pedal wouldn't go down stupid me needed to shorten master cycl rod then everthing worked great thanks to tech department for solving any problems with your fit call them they are great thanks again

Would Recommend

Nice product.

5.0

8 years ago

Bill

Salesville Ohio

Verified

Product was as described and accurate..

Would Recommend

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Showing 10 of 22 reviews

Questions & Answers

5 Questions • 5 Answers

What inner seal do these take?

by Blaine

• a year ago

1 answer

I have 14 inch rally rims welded up by a company in Fresno CA years ago. How do I measure the size to determine if your Mustang II Complete 11 In Front Disc Brake Kit, 5 on 4-3/4 will fit these rims?

by Marc

• 8 years ago

1 answer

Will this 910-31950 kit work with 14" wheels?

by Rod

• 11 years ago

1 answer

, will the 2" drop spindles work with this KIT ? I purchased these spindles at the Shades of the past swap meet from Southern rods and parts, late 90's to early 2000's .They are forged spindles .

by 35OLDS

• 11 years ago

1 answer

What is the size of the wheel lugs so that I may order lugnuts?

by 48Anglia

• 12 years ago

1 answer

5 of 5 questions shown

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