Product Summary

Rear Position, 11 Inch Rotor Diameter, Natural

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    Key Specs

    MFG. Part #91664091
    PositionRear
    Wheel Bolt Pattern (in.)5x4.5 in. | 5x4.75 in.
    Wheel Bolt Pattern (mm)5x114.3 mm | 5x120.65 mm
    Rotor Diameter11 Inch
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    Need To Know

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    Speedway Motors 91664091 Details

    Complete Rear Disc Brake Conversion Kit Includes:

    • 11" GM Rotors Multi Pattern
    • Fits 5x4.75" w/ 7/16 Studs & 5x4.5" w/ 1/2 Studs
    • Large GM Calipers w/ Self Adjusting E-Brake (1979 Cadillac El Dorado)
    • D54 Pads Included
    • Caliper Brackets & Spacers
    • Bracket Hardware
    • Flex Hoses & Clips
    • Emergency Brake Cables

    Tech Notes:

    • Does not fit S-10 Chassis or truck frames
    • Maximum diameter of 6.11" to fit rotor hat.
    • Rotor Center = 2-3/4" - Rotor Hat Section Inside Diameter = 6-1/8" You will need to modify your axles if they will not fit inside the rotor hat and you will need to modify the rotor if the center hole is too small for your axles.
    • .050x45 Degree Chamfer
    • 2.786" max register axle
    • Does not fit 14" rims, must use 15" or larger
    • When installing rear disc brake kit a disc/disc proportioning valve with a 1-1/8" bore master cylinder will be needed.
    • This kit will push your wheels out an additional .125” per side, longer wheel studs may be required after installation of this kit

    *Note: The emergency brake cables provided in the kit will fit 55 - 64 Full Size Chevrolet. Any other application will require the customer to modify the included cables to work with their application. The intermediate cable, center pull and cable couplers may not be necessary on 58 – 64 cars.

    Specs

    The caliper piston pin needs to be aligned with the notch in the pad to avoid fitment issues.

    Speedway Motors 91664091 Specifications

    KEY SPECS
    MFG. Part #91664091
    BrandSpeedway Motors
    PositionRear
    Wheel Bolt Pattern (in.)5x4.5 in. | 5x4.75 in.
    Wheel Bolt Pattern (mm)5x114.3 mm | 5x120.65 mm
    Rotor Diameter11 Inch
    Rotor TypeVented
    Caliper PistonsOne
    Caliper FinishNatural
    Parking Brake ProvisionYes
    Minimum Recommended Wheel Diameter15 Inch
    Rotor ShapeRound
    Hardware IncludedYes
    Rotor StylePlain Face
    Front Rotor IncludedNo
    Front Rotor Diameter11 Inch
    Front Caliper IncludedNo
    Rear Caliper IncludedYes
    Front Spindles IncludedNo
    Master Cylinder IncludedNo
    Brake Booster IncludedNo
    Brake Hoses IncludedYes
    Rear Rotor IncludedYes
    ColorNatural
    Mounting Bracket IncludedYes
    Front Caliper FinishNatural
    Bolt Pattern5 on 4.5" | 4.75"
    Front Caliper Piston Quantity1
    GENERAL
    Sold in QuantityKit
    GTIN Code635648180359
    Rotor Drum I.D.6.1875"
    Rotor Thickness1"
    Rotor I.D.2.75"
    Brake Lines IncludedNo
    Parking Brake Cables IncludedYes
    Brake Hose MaterialRubber
    Track Width Increase0.25"

    Ratings & Reviews

    4.5

    2 Reviews

    Overall Assessment

    Customers have praised the product for its easy installation and usability, specifically in upgrading brake systems of older car models like the '58 Chevy truck. The brake conversion process is straightforward, and connecting the emergency brake cables is simple. Users didn't mention any negative aspects, indicating excellent product quality and satisfaction. Compared with competitors, our product stands out with its practical application and superior performance in brake system upgrades.

    4.5

    2 reviews

    5

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    4

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    3

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    Fine way to upgrade brake system

    5.0

    7 months ago

    Ron

    Bartlett tn

    Verified

    Building 1958 Chevy truck.. using 57 Chevy rear end. Brake conversion is easy as well as connecting emergency brake cables

    Would Recommend

    Yes

    4.0

    5 years ago

    Deano

    Magnolia Delaware

    Verified

    Don't have anything negative about the product

    Would Recommend

    Showing 2 of 2 reviews

    Questions & Answers

    Fitment

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