Product Summary

Rear Position, Dual: 5 on 4.5" | 4.75" Bolt Pattern

    Key Specs

    MFG. Part #91664092
    BrandSpeedway Motors
    Rotor Diameter11 Inch
    Rotor TypeVented

    Need To Know

    This Product Will Ship Free

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    Quick and Easy Returns

    Return Policy


    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
    • D54 Pads Included
    • Caliper Brackets & Spacers
    • Bracket Hardware
    • Flex Hoses & Clips

    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


    MFG. Part #91664092
    BrandSpeedway Motors
    Rotor Diameter11 Inch
    Rotor TypeVented
    Bolt PatternDual: 5 on 4.5" | 4.75"
    Caliper PistonsOne
    Caliper FinishNatural
    Parking Brake ProvisionNo
    Minimum Recommended Wheel Diameter15 Inch
    Rotor Drum I.D.6.1875"
    Rotor Thickness1"
    Rotor ShapeRound
    Rotor I.D.2.75"
    Track Width Increase.250"
    Hardware IncludedYes
    Sold in QuantityKit
    Rotor StylePlain Face
    Front Rotor IncludedNo
    Front Rotor Diameter11 Inch
    Rear Rotor IncludedYes
    Front Caliper IncludedNo
    Front Caliper Piston Quantity1
    Front Caliper FinishNatural
    Rear Caliper IncludedYes
    Front Spindles IncludedNo
    Master Cylinder IncludedNo
    Brake Booster IncludedNo
    Parking Brake Cables IncludedNo
    Brake Hose MaterialRubber
    Brake Hoses IncludedYes
    Mounting Bracket IncludedYes