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#91603021
Mustang II Disc Brake Rotor and Bearing-Seal Kit, 5 on 4-1/2 Inch
- Includes (2) Speedway Motors Mustang II Disc Brake Rotor & (1) Speedway Motors Bearing-Seal Kit
- Vented stock 9-1/4" diameter brake rotors for 1974-1980 Mustang II, Pinto, or Bobcat spindles
- Has a 5 on 4-1/2" bolt pattern with corresponding 1/2" diameter fine thread wheel studs
$127.99
/each
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$129.97
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Product Summary
Front Position, Round Rotor Shape, Vented Rotor Type
- Includes (2) Speedway Motors Mustang II Disc Brake Rotor & (1) Speedway Motors Bearing-Seal Kit
- Vented stock 9-1/4" diameter brake rotors for 1974-1980 Mustang II, Pinto, or Bobcat spindles
- Has a 5 on 4-1/2" bolt pattern with corresponding 1/2" diameter fine thread wheel studs
- Bearing kit includes (2) inner wheel bearings, (2) outer wheel bearings, and (2) inner grease seals
- No races or cups included
Comes as a Kit
View Kit Components
Key Specs
| Rotor Diameter | 9.25 Inch |
| Rotor Style | Plain Face |
| Rotor Material Type | Steel |
| Rotor Thickness | 0.884" |
| Bolt Pattern | 5 on 4.5" |
Need To Know
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Speedway Motors 91603021 Details
A fresh rebuild will help you roll down the road the way you intended! Our tech experts here at Speedway Motors found that sometimes you just need a good old fashioned rebuild kit with fresh wear parts. A kit of just bearings and rotors to replace those worn out braking components on your street rod or hot rod truck!
Kit Contains:
- (2) Speedway Motors Mustang II Disc Brake Rotor
- (1) Speedway Motors Bearing-Seal Kit
Speedway Motors Mustang II Disc Brake Rotor
Vented stock 9-1/4" diameter brake rotors for 1974-1980 Mustang II, Pinto, or Bobcat spindles (or Speedway brake kits using '49-'54 Chevy spindles). These five lug conversion brake rotors are new, not plugged or re-drilled. Has a 5 on 4-1/2" bolt pattern with corresponding 1/2" diameter fine thread wheel studs.
- 5 on 4-1/2 Inch
- Outside Diameter of rotor disc - 9.256"
- Thickness of vented disc - .884"
- I.D. of the back side of rotor - 6.256"
- Rear rotor face to bearing hub - .290"
- Outer hub diameter where wheel will mount - 5.834"
- Outer hub height - 1.450"
- Bearing snout is 1.60" tall, 2.55" diameter at bottom and 2.384" at outer end.
Speedway Motors Bearing-Seal Kit
This bearing and seal kit includes two inner wheel bearings, two outer wheel bearings, and two inner grease seals. This kit is enough for two brake rotors and is intended to be used with a new rotor installation as this bearing and seal kit kit does not include the bearing races or cups. Bearing races or cups are provided as installed and included inside the new rotors as part of this rotor and new bearing and seal kit.
Includes (2) inner wheel bearings, (2) outer wheel bearings, and (2) inner grease seals. Enough for two brake rotors. No races or cups included.
-Large Bearing-
Thickness: .656"
Upper OD: 1.900"
Lower OD: 2.150"
Bearing ID: 1.375"
-Small Bearing-
Thickness: .651"
Upper OD: 1.380"
Lower OD: 1.570"
Bearing ID: 0.864"
Speedway Motors 91603021 Specifications
Speedway Motors 91603021 Specifications
| KEY SPECS | |
|---|---|
| MFG. Part # | 91603021 |
| Brand | Speedway Motors |
| Rotor Diameter | 9.25 Inch |
| Rotor Style | Plain Face |
| Rotor Material Type | Steel |
| Rotor Thickness | 0.884" |
| Bolt Pattern | 5 on 4.5" |
| GENERAL | |
| Position | Front |
| Rotor Shape | Round |
| Rotor Type | Vented |
| Rotor Finish | Plain |
| Flange Diameter | 5.75" |
| Stud Length | 1.25" |
| Stud Diameter | 0.5" |
| Sold in Quantity | Kit |
Ratings & Reviews
5
22 Reviews
Customers highly recommend the product due to its excellent quality and fit. The parts streamline the process of changing from 4 lug to 5 lugs, allowing easy installation and getting vehicles back on the road in a short amount of time. The product is praised for being perfect for applications like old Ford models, with its quality surpassing customer expectations. The bearing numbers are helpful for determining fit for unique applications. The product ensures a smooth and positive braking experience, reflecting its superior performance. It is considered good value, combining practicality and affordability.
Ratings & Reviews
5
22 Reviews
Customers highly recommend the product due to its excellent quality and fit. The parts streamline the process of changing from 4 lug to 5 lugs, allowing easy installation and getting vehicles back on the road in a short amount of time. The product is praised for being perfect for applications like old Ford models, with its quality surpassing customer expectations. The bearing numbers are helpful for determining fit for unique applications. The product ensures a smooth and positive braking experience, reflecting its superior performance. It is considered good value, combining practicality and affordability.
5
22 reviews
5
21
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Product was a great fit and as advertized
5.0
8 months ago
AVPir8
Herndon,Va
Verified
Worked out well and did not take long to swap out!
Would Recommend
Yes and would recommend Speedeway to anyone.
5.0
11 months ago
Sid
Louisiana
Verified
Excellent quality for the price
Would Recommend
I would buy again
5.0
a year ago
Royal
Fresno Ca.
Verified
I used this on our 1952 XK120 Jaguar Roadster. Great product
Would Recommend
perfect and what I was looking for
5.0
a year ago
Vince V
Milwaukie Or.
Verified
Need a set of 5 lug Mustang II rotor/hubs for a big brake setup I'm working on designing. I only bought them to use the center hub section But they were good quality parts the way they were.
Would Recommend
I am very happy with my purchase
5.0
a year ago
Bob (Red)
Colchester, CT
Verified
I replaced the front brakes on my 36 Ford pickup, very happy with the quality and price of the parts, much better than the quality of the aftermarket units they replaced.
Would Recommend
Yes
5.0
2 years ago
Paul Nelson
Novato Ca
Verified
Always get the best parts from you
Would Recommend
Crazy cheap
5.0
2 years ago
Bukshe
northern Ontario
Verified
I bought these to get the car on its wheels and push it around. Planning on Wilwoods.
Would Recommend
Excellent quality
5.0
3 years ago
Perry
Orem, Utah
Verified
Haven't run these parts yet but the fit and quality appear to be excellent
Would Recommend
Yes
5.0
3 years ago
Mopar man
Las Vegas
Verified
Good product ,great price
Would Recommend
MUSTANG II
5.0
3 years ago
HOT ROD PETE
Commack, NY 11725
Verified
Tech asked the right questions to get my order correct. GOOD QUALITY PARTS.
Would Recommend
Showing 10 of 22 reviews
Fitment
Fitment
1974-1978 Ford Mustang II
1974-1979 Ford Pinto
1975-1979 Mercury Bobcat

