Complete Power Steering Upgrade: Converts 1958–1964 Chevy full-size cars to power steering with new 500 Series steering box, centerlink, pitman arm, and idler arm for modern performance., High-Performance 14:1 Ratio Steering Box: Provides improved directional control, quicker response, and a more stable on-road feel compared to stock manual steering., Direct Bolt-On Installation: Designed as a simple bolt-in replacement for manual steering; no external brackets or shims required for most applications., Durable, Smooth Operation: Features a recirculating ball gear design with open-centered rotary valve for low friction, precise steering, and excellent road feedback., Fits Full-Size Chevy Models: Compatible with 1958–1964 Chevy Impala, Bel Air, and Biscayne; 1958–60 cars require idler arm ad
1958-64 Chevy Car Power Steering Conversion Kit, 14:1 Ratio Speedway Motors
1958-64 Chevy Car Power Steering Conversion Kit, 14:1 Ratio
Sku # 91032580
Mfr. Part # 91032580
Condition
New
Brand
Speedway Motors
Sold
Kit
Details

You get a new 500 series power steering box, new centerlink, new pitman and idler arm.  Power steering pump, power steering hoses, and pulleys are sold separately.  1958-'60 cars need to order the 910-32582 idler arm adapter. Steering box uses inverted flare fittings, 11/16" fine on the pressure side and 5/8" fine thread on the return side. Has a 3/4" 30-spline input shaft.

  • 500 Series power steering boxes are the key components to a high performance modern style power steering system.
  • Features a 14:1 ratio unit which provides superior directional control and road feedback, as well as a more stable feel to the driver.
  • Recirculating ball gears for low friction and increased steering response.
  • An open centered, rotary type valve provides smooth operation throughout the steering range while retaining excellent road feel.
  • For the 1958-64 full-size Chevrolet, the 500 Series is a direct replacement for the manual steering box and is “bolt on” easy to install.
  • Another unique feature is the mounting bosses which are integrated into the casting, eliminating the need for an external bracket and lining up perfectly to your column without shims.
  • Works with both the original and aftermarket steering columns and sway bars.
  • This is the very best gearbox available on the market today to convert your full-size Chevrolet to power steering.
  • New high performance center link system that upgrades the stock center link, pitman arm and idler arm for the best road feel and performance

Note:  Some applications require slight modification to the radiator tank to clear the steering box.  The steering box provided in this kit is a 'bolt-in' application.  Connecting the steering column to the steering box will require fabrication and the use of u-joints, rag joints, and steering shaft per the installers build choice.  

 

Kit Includes:

  • Pitman Arm
  • Idler Arm
  • Center Link
  • Steering Box
  • Mounting Bolts

 

Specs
Spline OD
.75"
Spline Count
30
Ratio
14:01
MFG. Part #
91032580
Reviews

yes

Rated
Product Rating
by kens body on March 10, 2026

Summary: work good

Yes, I recommend this product.

Happy with purchase

Rated
Product Rating
by Malc on January 01, 2025

Summary: Very happy with quality if the parts ordered. Happy with delivery time

Yes, I recommend this product.

Highly recommend This product easy to install it works excel

Rated
Product Rating
by Karloz209 on September 05, 2022

Summary: Thank you speedway for the customer service and fast shipping!

Yes, I recommend this product.

Brake kit is awesome

Rated
Product Rating
by Theodore on February 06, 2021

Summary: They are awesome just what I wanted

I would buy again

Rated
Product Rating
by Pat scat on December 29, 2020

Summary: Fits great

Yes, I recommend this product.

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About
Speedway Motors is America’s Oldest Speed Shop® and has been a trusted source for specialty rodding and racing products and friendly expert advice for more than 74 years. Founded in 1952 by “Speedy” Bill Smith – a racer and street rodder himself – Speedway has grown from a one-man operation to become the world’s largest manufacturer, distributor and retailer of street rod and racing products. Our industry-leading fast delivery is the result of same-day shipping from our state-of-the-art, centrally located 500,000 sq. ft. headquarters. Speedway’s size offers customers unmatched product selection and low pricing, while our excellent technical support and customer service have made us a recognized leader in the rodding and racing industries.