Product Summary

Universal Fit, Front Position, 5 on 4.75" Bolt Pattern

  • Uses 9 1/4" Mustang II vented rotors with MII calipers & pads
  • Your stock Chevy spindles must be machined or use Speedway '49-'54 Chevy style spindles
  • For use on street rod tube front axles when using '49-'54 Chevy style spindles
  • Will not work with stock '49-'54 steering arms
  • Not to be installed on stock '49-'54 Chevy Vehicle front ends

Comes as a Kit

Key Specs

Bolt Pattern5 on 4.75"
Rotor Diameter9.25 Inch
Rotor TypeVented
Caliper PistonsOne

Need To Know

This Product Will Ship Free

Shipping Policies & FAQs

Quick and Easy Returns

Return Policy

Speedway Motors 91031948 Details

This complete brake and hub kit is designed to install 1974-80 Mustang II/Pinto 9-1/4" rotors and calipers onto your machined Chevy 1949-54 car spindles.

Kit features:

  • 9-1/4" brake rotor, 5 x 4-3/4" wheel bolt pattern
  • Remanufactured Pinto/Mustang iron calipers, 7/16"-24 inlet
  • 16" rubber brake lines
  • Zinc plated dust caps
  • All necessary brackets, adapters, bearings, seals, hardware and instructions included


  • Will not work with traditional style steering (no room for upper steering arm).
  • Will not work with stock 1949-54 steering arms. Not to be installed on stock 1949-54 Chevy vehicle front ends.
  • For use only on street rod tube or I-beam front axles when using 1949-54 Chevy style spindles intended for Model T and Model A to 1936 Ford front ends.


Speedway Motors 91031948 Specifications

MFG. Part #91031948
BrandSpeedway Motors
Bolt Pattern5 on 4.75"
Rotor Diameter9.25 Inch
Rotor TypeVented
Caliper PistonsOne
Caliper FinishNatural
Parking Brake ProvisionNo
Rotor ShapeRound
Hardware IncludedYes
Front Rotor IncludedYes
Front Rotor Diameter9.25 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 Thickness.88"
Stud Diameter.44"
Stud Length.93"
Thread Pitch7/16"
Sold in QuantityKit
NotesIncludes rotors, bearings and seals, calipers, pads, brake hoses, brake tabs, and caliper brackets.
Rotor Material TypeCast Iron