Product Summary

Front Position, 5 on 4.5" Bolt Pattern, Natural

  • Easily installs 11" rotors and '69-'77 mid-size GM single piston calipers to your '37-'48 Ford passenger car spindles or '37-'47 Ford pickup spindles
  • Designed to work on 1937-48 Ford spindles that have the cast on steering arms. It will not function correctly when used on a spindle that uses bolt on steering arms and would require alteration
  • 11" vented rotors offer improved heat dissipation and greater rotational mass for better braking performance, 5 on 4-1/2" bolt pattern and 1/2"-20 studs
  • Standard GM midsize calipers feature a large 2-3/4" bore and increased brake pad surface to help prevent brake fade
  • Uses an inner bearing and seal adapter to increase the O.D. for the larger bearings and seals used in the kit, no machine work required

Comes as a Kit

Key Specs

Bolt Pattern5 on 4.5"
Rotor Diameter11 Inch
Rotor TypeVented
Caliper PistonsOne

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Speedway Motors 91031940 Details

Easily installs 11" Ford/Mopar rotors and 1969-1977 midsize GM single piston calipers to your 1937-1948 Ford passenger car spindles. No machine work needed. Great for street rods based on 1932-1948 Fords, however, these kits are much too large and heavy for a T-bucket or an early roadster.

Not for use with bolt-on steering arms.

Note: Some applications may require you to purchase item (617-8562) with this kit.

Item Details

'11" Ford/Mopar rotor and ''69-''77 GM caliper to early Ford spindles'


Speedway Motors 91031940 Specifications

MFG. Part #91031940
BrandSpeedway Motors
Bolt Pattern5 on 4.5"
Rotor Diameter11 Inch
Rotor TypeVented
Caliper PistonsOne
Caliper FinishNatural
Parking Brake ProvisionNo
Rotor ShapeRound
Front Rotor IncludedYes
Front Rotor Diameter11 Inch
Front Caliper IncludedYes
Front Caliper Piston Quantity1
Front Caliper FinishNatural
Rear Caliper IncludedNo
Front Spindles IncludedNo
Master Cylinder IncludedNo
Brake Booster IncludedNo
Rear Rotor IncludedNo
Rotor Thickness1.00"
Rotor I.D.6.995"
Stud Diameter.50"
Stud Length1.00"
Thread Pitch1/2"-20
Centerline of Holes7.00"
Sold in QuantityKit
NotesIncludes rotors, bearings and seals, calipers, pads, brake hoses, brake tabs, and caliper brackets.
Front Suspension TypeStraight Axle
Rotor Material TypeCast Iron