1973-77 GM Midsize 11 Inch Brake Rotor, 5 on 5 Inch

#91031064

1973-77 GM Midsize 11 Inch Brake Rotor, 5 on 5 Inch

Name: 1973-77 GM Midsize 11 Inch Brake Rotor, 5 on 5 Inch
Brand: Speedway Motors
SKU: 91031064
Price: 77.99 USD
Availability: InStock
Rating: 4.9 (20 reviews)

20 Reviews

27 Questions

These 11" brake rotors come with 5/8" coarse threads installed making them perfect for dirt circle track cars
Fit 1973 to 77 GM midsize cars as well as 1970 to 81 Camaro and 1980 and up Impala as long as the correct bearing kit is used
5 on 5" bolt pattern is used on these rotors which is popular for circle track cars

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Product Summary

Front Position, Round Rotor Shape, Vented Rotor Type

These 11" brake rotors come with 5/8" coarse threads installed making them perfect for dirt circle track cars
Fit 1973 to 77 GM midsize cars as well as 1970 to 81 Camaro and 1980 and up Impala as long as the correct bearing kit is used
5 on 5" bolt pattern is used on these rotors which is popular for circle track cars
Premium castings and vented design ensure fade free performance and long rotor life
Not suggested for ashpalt race cars due to the high stress placed on the hub in that application - billet hubs are recommended for asphalt cars

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Key Specs

Rotor Diameter	11 Inch
Rotor Style	Plain Face
Rotor Material Type	Cast Iron
Rotor Thickness	1"
Bolt Pattern	5 on 5"

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Installation Details

Installation Tips

Proper Break-In Procedure for Steel or Cast Iron Rotors

New steel/iron rotors should be bedded in before being used in racing conditions. Proper bedding will prepare the rotor surface, prolong the rotor's life, and make it more resistant to thermal checking or cracking under severe braking conditions. The following procedures should be performed when bedding in both steel and cast iron rotors. It is best to bed in a new rotor using a used set of pads, preferably ones which will not create heat rapidly. Generating heat too rapidly will thermal shock the rotors. Likewise, when bedding in a new set of brake pads it is best to perform the process on a used rotor. This new/used bedding process permits controlled bedding of each individual component.

Make sure rotor surfaces are free from oils, grease, and brake fluid. Run vehicle up to a moderate speed and make several medium deceleration stops to heat up the rotor slowly. This will help reduce the chance of thermal shock caused by uneven heating of the rotor. Pull into the pits and allow the rotor to cool to ambient air temperature. Care should be taken not to ride the brakes into the pits as this may hot spot the rotor causing premature wear to the surface or structural damage.

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Speedway Motors 91031064 Details

1973-1977 GM mid sized front brake rotor. 5 on 5" with 5/8" coarse studs installed. 11" diameter x 1". IMCA Approved.

This rotor is designed for dirt track applications and should NOT be used for asphalt racing.

Use bearing/seal kit # 910-31042 when using this rotor on the 1973-77 Chevelle type spindle.

Use bearing/seal kit # 910-31880 when using this rotor on the 0.844" outer Camaro or 1980-up Impala type spindle.

Item Details

23.5 lbs.

Application

This rotor fits the following spindles:

1973-1977 Buick Century, Regal
1975-1978 Buick Skylark
1970-1978 Chevy Camaro
1977-1978 Chevy Full size
1973-1977 Chevy Malibu, Monte Carlo
1975-1978 Chevy Nova
1973-1977 Oldsmobile Cutlass
1970-1978 Pontiac Firebird
1973-1977 Pontiac Grand Prix, LeMans GTO
1975-1978 Pontiac Ventura, Phoenix

Specs

This rotor uses the following bearings and seals:

Outer Bearing Cone 912TLM11949
Cup 912TLM11910
Inner Bearing Assembly 912TS6
Inner Seal 912S19753

CA Prop 65

Speedway Motors 91031064 Specifications

KEY SPECS
MFG. Part #	91031064
Brand	Speedway Motors
Rotor Diameter	11 Inch
Rotor Style	Plain Face
Rotor Material Type	Cast Iron
Rotor Thickness	1"
Bolt Pattern	5 on 5"

GENERAL
Position	Front
Rotor Shape	Round
Rotor Type	Vented
Rotor Finish	Plain
Stud Length	2.25"
Stud Diameter	0.63"
Thread Pitch	5/8"-11
Weight	23.5 lbs.
Sold in Quantity	Each

Ratings & Reviews

4.9

20 Reviews

Overall Assessment

Customers praise the product for its superior quality and practicality, particularly noting its perfect fitting and high convenience. The material quality has been commended for being robust, having withstood challenges like dirt racing without issues. The product has been identified as a time-saver thanks to easy changeovers and features like the 5x5 bolt pattern. Effectively solving the 5 on 5 problem, these rotors prove ideal for the task, whether for a Camaro or a vintage Chevrolet. However, it's advised against using them on asphalt. They've been identified as a competitively-priced, dependable solution for various car restoration needs.

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4.9

20 reviews

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Sort Reviews

Yes would buy again

5.0

a year ago

Nebraska

Verified

Switch out lugs to 1/2-20

Would Recommend

Worked perfect. Parr's always do thanks

5.0

2 years ago

Pops

Tuscumbia al

Verified

Yes several times

Would Recommend

Great looking rotors

5.0

4 years ago

Turn left

Central lake,Mi

Verified

Got these rotors fast,and exactly what I needed

Would Recommend

Everything included for this brake conversion

5.0

5 years ago

Jimco

Scotch creek bc

Verified

Very pleased to get a complete disc brake conversion kit for the 57 chev..everything needed is there,,,,they even had the booster and master at a good deal will be buying more restro parts from them

Would Recommend

yes

5.0

5 years ago

+++

++++

Verified

+++

Would Recommend

EASY Changeover!

5.0

5 years ago

Stevens Racing

Shelton, WA

Verified

Changed our 70's Camaro dirt race car over from 5x4.75 to this 5x5. Super easy swap out with the suggested bearing kit.

Would Recommend

Worked good

5.0

5 years ago

10y

Verified

Dirt track

Would Recommend

I would buy this again.

4.0

6 years ago

Matt

Searcy, AR

Verified

Use it on a camaro. And its good because it is convenient and is a 5 on 5 bolt pattern instead of 4 and 3/4 like the camaro had. Just have to use the baring kit that ilabeled with it for the type of car you're putting it on.

Would Recommend

Fit perfectly

5.0

6 years ago

Wheel

Bell City Mo

Verified

Would buy again

Would Recommend

Camaro rotors

5.0

7 years ago

M&T racing

Eugene Missouri

Verified

Fair price. Beats the old days when you had to drill out studs and install. Kinda fought the first set a little. Chevelle seals, Camaro inner bearings, metric outer bearings.

Would Recommend

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Questions & Answers

27 Questions • 10 Answers

Sort Questions

Will this rotor fit a 84 caprice to convert to 5x5?

by Chris

• 6 years ago

1 answer

View Answer

Just curious if this rotor will fit 1983 Buick lesabre..looking for 11" rotor 5x5 5/8 studs and bearing kit. Thanks

by Nodakracer

• 6 years ago

1 answer

View Answer

what bearings and races would i need to use on this rotor on a 56 chevy 1/2 ton pickup using your 47-59 basic disc brake kit?

by oldschool

• 6 years ago

1 answer

View Answer

Will this rotor fit a 1976 Oldsmobile cutlass supreme

by Shawn

• 9 years ago

1 answer

View Answer

My asphalt circle track rules mandate a stock rotor. Is this one weaker than a standard stock rotor? I typically use them for one season and throw them away. But I have never had a failure with a stock Camaro rotor. I just need to switch to the 5X5 Bolt pattern because I switch to a 9 inch rear that is 5x5

by Funhouse

• 9 years ago

1 answer

View Answer

Will this rotor fit A 1980 Camaro spindle? And if so what calipers will I need for the same application?

by The kid

• 9 years ago

1 answer

View Answer

I have 72 monte Carlo 5x4.75 I want to convert to 5x5. Would this rotor work with the stock spindles and bearings

by Jose

• 9 years ago

1 answer

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Im not sure of the year I have. I know its an 11" rotor Spindle # is 371875 and a 371876. Im looking for a 5 x 5 pattern, 11" rotor that will work with the above spindle #'s

by Brian

• 9 years ago

1 answer

View Answer

Will this fit an 1983 caprice? If so what bearings and seal would i need with it

by Jaye

• 9 years ago

1 answer

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Do you have this rotor in 5x4.75 bolt pattern, that will fit 79 camaro? Thanks

by Shannon

• 9 years ago

1 answer

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