Products to Compare (max of 3)
X
Compare These Parts
America's Oldest Speed Shop ® Talk to the Experts. Call 800.979.0122, 7am-10pm, everyday.
Help Center
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
Shop By
Support
Account
Add to Cart
$49.99
1979-Up GM Metric Brake Rotor, 5 on 4-3/4 In, 5/8-11 In Coarse Studs
1979-Up GM Metric Brake Rotor, 5 on 4-3/4 In, 5/8-11 In Coarse Studs

1979-Up GM Metric Brake Rotor, 5 on 4-3/4 In, 5/8-11 In Coarse Studs

4 Reviews | 9 Answered Questions
In Stock
Can Ship FREE
1979-Up GM Metric Brake Rotor, 5 on 4-3/4 In, 5/8-11 In Coarse Studs
Image Gallery
1979-Up GM Metric Brake Rotor, 5 on 4-3/4 In, 5/8-11 In Coarse Studs
1979-Up GM Metric Brake Rotor, 5 on 4-3/4 In, 5/8-11 In Coarse Studs
Zoomed In Image
Part # 91031091
$49.99
each
Quantity:
Add to Cart
Call to Order
Add to Buildlist
Compare

Details
Reviews
Q&A
Articles

Important Messages:

  • Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.

Details

Rotor Location:
Front
Rotor Diameter:
10.50
Rotor Shape:
Round
Rotor Construction:
Vented
Drilled:
No
Slotted:
No
Bolt Pattern:
5 on 4.75"
Thread Pitch:
5/8"-11
Material Type:
Steel
Finish:
Natural
Sold in Quantity:
Each

Info

This 1979-up GM Metric front disc brake rotor will work with a Set # 6 inner bearing/race which fits most spindles. 5 on 4-3/4" with 5/8"-11 studs installed. 10.5" diameter x 1".  Must be used with 912-TS3 outer bearings for 1982-1987 spindle applications.  IMCA Approved.

This is a 1979-1981 Metric GM rotor with the bolt pattern changed to 5 on 4-3/4". It can be used on 1982-1987 GM metric spindles if you use our bearing/seal kit 91031048, or use at least the 1979-1981 style outer bearing 912TS3.

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

Notes

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.

Related Products

More Like This

Reviews

Q & A

Articles

You May Also Like

Suggestions
Error
Note
Ok