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1" Diameter Rear Sway Bar w/ Hardware for 1964-1966 Ford Mustang, part number FM9121
CLASSIC PARTS GARAGE · SCHEMATIC
FM9121
FM9121Kanter Auto

1" Diameter Rear Sway Bar w/ Hardware for 1964-1966 Ford Mustang

1-inch diameter rear sway bar with hardware for compatible 1964-1966 Ford Mustang applications. Designed to help reduce body roll, improve rear suspension control, and sharpen cornering response on restoration, street-performance, and handling-focused builds.

In stock12 Months

Not concours correct

This sway bar is appropriate for compatible 1964-1966 Ford Mustang applications because it is designed for the rear suspension and uses a 1-inch diameter bar to increase rear roll stiffness.

$280.00$309.99Save $29.99
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003Specification

What it is

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1" Diameter Rear Sway Bar w/ Hardware for 1964-1966 Ford Mustang Product Description Shop 1-inch rear sway bar with hardware for 1964-1966 Ford Mustang models when upgrading rear suspension control and cornering stability. Replacing a used Mustang rear sway bar with worn bushings, damaged hardware, or an undersized setup can help restore predictable handling. Order 1964-1966 Mustang rear sway bar components for restoration, street-performance, or handling-focused builds. The 1-inch diameter rear sway bar is designed to help resist body roll by linking the rear suspension from side to side. Its larger performance-oriented diameter can provide increased roll stiffness when correctly matched with the vehicle's front suspension, springs, shocks, tires, and driving setup. Key Features Designed for compatible 1964-1966 Ford Mustang applications 1-inch diameter rear anti-roll / sway bar Helps reduce body roll during cornering Supports improved rear suspension response Useful for street, restoration, and performance builds Mounting hardware included where specified Can complement upgraded shocks, springs, and front sway bars Suitable for replacing missing, damaged, or worn rear sway bar components Product Specifications Specification Details Vehicle Ford Mustang Model Years 1964-1966 Product Type Rear Sway Bar / Anti-Roll Bar Position Rear Bar Diameter 1 Inch Hardware Included / Verify Contents Bushings Verify End Links Verify Material Verify Finish Verify Installation Bolt-On / Verify Application Suspension Type Verify Vehicle Configuration Why Choose a 1-Inch Rear Sway Bar? A larger rear sway bar can help control chassis roll and sharpen handling by increasing rear roll stiffness. It is a practical upgrade for classic Mustang owners who want more responsive cornering while retaining the original suspension architecture.

Features
  • Designed for compatible 1964-1966 Ford Mustang models
  • 1-inch diameter rear sway bar
  • Helps reduce body roll during cornering
  • Supports improved rear suspension response
  • Can improve chassis balance when correctly matched to the front suspension
  • Suitable for restoration and performance applications
  • Hardware included where specified
  • Compatible with stock-style rear suspension architecture where applicable
  • Useful for replacing a missing, damaged, or undersized rear anti-roll bar
  • Can complement upgraded shocks, springs, tires, and front sway bars
In the box
  • 1 × 1-inch rear sway bar
  • Mounting brackets
  • Bushings where supplied
  • End links where supplied
  • Fasteners and retaining hardware
  • Installation instructions where supplied

Shipping weight 22.00 lb

004Application register

Everything this fits

1 application · 0 verified

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Ford1
  • 1964–1966Mustang
    All engines

Intended for compatible 1964-1966 Ford Mustang applications. Verify the exact rear suspension configuration before ordering. Confirm the vehicle has the correct mounting points or required brackets for installation. Check rear axle housing and leaf-spring clearance. Verify exhaust routing and muffler clearance. Confirm whether the supplied bushings, brackets, and end links match the vehicle. Check compatibility with aftermarket lowering springs, traction devices, or modified rear suspension components. A 1-inch rear bar can significantly alter chassis balance, so front sway bar size and overall suspension setup should be considered. Verify tire width and wheel clearance where suspension travel is limited. Inspect mounting areas for rust, cracks, or previous repairs before installation. Do not overtighten polyurethane or rubber bushings beyond manufacturer guidance. Recheck mounting hardware after initial driving. Final compatibility should be confirmed against the exact supplier part number.

005Counter questions

Asked about this part

What is this product?
It is a 1-inch diameter rear sway bar kit with hardware for compatible 1964-1966 Ford Mustang applications.
What does a rear sway bar do?
It helps reduce body roll by linking the left and right sides of the rear suspension.
Is this the same as an anti-roll bar?
Yes. Sway bar, stabilizer bar, and anti-roll bar are common names for the same type of component.
What model years does it fit?
It is intended for compatible 1964-1966 Ford Mustang applications.
Does it fit every 1964-1966 Mustang?
Not automatically. Rear suspension configuration, mounting points, exhaust routing, and modifications should be verified.
Does it fit a 1964½ Mustang?
It may, depending on the exact suspension configuration and supplier application data. Verify the specific part number.
Can it fit a 1965 Mustang?
Yes, when the exact kit is specified for the vehicle.
Can it fit a 1966 Mustang?
Yes, when the application matches.
Does body style matter?
It can. Coupe, fastback, and convertible configurations should be checked against the manufacturer’s application information.
Is hardware included?
Yes, hardware is included according to the product title, but exact contents should still be verified.
Are bushings included?
They may be included as part of the hardware kit. Verify package contents.
Are mounting brackets included?
They may be included. Verify the exact kit.
Are end links included?
They may be included depending on the package.
Are bolts and nuts included?
Typically yes where required, but verify the listing.
Will it make the car handle better?
It can improve cornering response and chassis balance when matched correctly to the rest of the suspension.
Can it reduce understeer?
Increasing rear roll stiffness can reduce understeer, depending on the overall setup.
Can it increase oversteer?
Yes, if the rear bar is too stiff relative to the front suspension and tire grip.
Is a 1-inch rear sway bar aggressive?
It can be a substantial rear roll-stiffness upgrade on a classic Mustang.
Can I install this with a stock front sway bar?
Possibly, but overall handling balance should be considered carefully.
Is it better to upgrade front and rear sway bars together?
Often, yes, especially for a balanced handling setup.
Can it be used with lowering springs?
Yes, but suspension travel and bar geometry should be checked.
What is the biggest fitment mistake to avoid?
Ordering based only on the 1964-1966 Mustang model years without verifying rear suspension, axle, exhaust, mounting points, and surrounding modifications.
What is the biggest handling mistake to avoid?
Installing a very stiff rear bar without considering the front sway bar, springs, shocks, tires, and overall chassis balance.
What is the biggest installation mistake to avoid?
Tightening the kit before checking bar orientation, symmetry, suspension travel, exhaust clearance, and hardware alignment.
What should I verify before ordering?
Confirm the 1964-1966 Ford Mustang model year, body style, rear suspension configuration, rear axle type, sway bar mounting points, exhaust routing, brake and parking-brake cable clearance, ride height, front sway bar combination, bushing size, end-link requirements, included hardware, and exact supplier part number before purchase.
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