Prothane Polyurethane Front Sway Bar Bushings Kit 4WD (1984-89 4Runner)

Prothane Polyurethane Front Sway Bar Bushing Kit – 19mm or 23mm

For 1984–1989 Toyota 4Runner 4WD

Overview

Restore the factory handling, steering response, and cornering stability of your 1984–1989 Toyota 4Runner 4WD with the Prothane Polyurethane Front Sway Bar Bushing Kit. Engineered as a direct-fit replacement for worn factory rubber sway bar bushings, this complete kit delivers improved suspension performance, reduced body roll, and long-lasting durability for both street and off-road driving.

Factory rubber sway bar components gradually deteriorate from age, heat, oil, moisture, road salt, and environmental exposure. As these bushings wear, the sway bar can move excessively, reducing steering precision, increasing body roll, and creating suspension noise. Prothane's premium polyurethane bushings are designed to resist these conditions while maintaining a secure sway bar connection for improved handling and extended service life.

This kit is available for 19mm or 23mm factory front sway bars. Because Toyota installed multiple sway bar diameters throughout production—and many vehicles have been repaired or modified over the years—the only reliable way to select the correct kit is to measure your front sway bar before ordering.

Features

• Complete front sway bar bushing kit
• Available for 19mm or 23mm factory front sway bars
• High-performance polyurethane construction
• Direct replacement for factory rubber bushings
• Improves steering response and cornering stability
• Reduces body roll and unwanted sway bar movement
• Helps maintain proper suspension geometry
• Resistant to oil, grease, road salt, chemicals, moisture, ozone, and UV exposure
• Longer service life than conventional rubber bushings
• Includes premium polyurethane installation grease
• Manufactured by Prothane Performance Suspension

Benefits

Replacing worn sway bar bushings helps restore factory suspension performance while improving overall vehicle control.

Benefits include:

• Improved steering precision
• Reduced body roll during cornering
• Increased front-end stability
• Better suspension response on-road and off-road
• Reduced squeaks and suspension noise
• Longer service life than factory rubber bushings
• Excellent upgrade for restoration, overlanding, rock crawling, and daily driving

What's Included

This kit includes:

• Front sway bar polyurethane bushings
• Front sway bar hardware
• High-performance polyurethane installation grease

Vehicle Fitment

Designed specifically for factory-equipped 4WD vehicles.

Toyota 4Runner

First Generation

• 1984 Toyota 4Runner 4WD
• 1985 Toyota 4Runner 4WD
• 1986 Toyota 4Runner 4WD
• 1987 Toyota 4Runner 4WD
• 1988 Toyota 4Runner 4WD
• 1989 Toyota 4Runner 4WD

Compatible with:

• Factory front sway bar
• 19mm or 23mm sway bar (verify before ordering)
• 22R engine
• 22RE engine
• 22R-TE engine
• 3.0L 3VZ-E V6 (1988–1989 4Runner)
• Manual and automatic transmissions

Choosing the Correct Sway Bar Size

This kit is available for 19mm and 23mm factory front sway bars.

Toyota used multiple sway bar diameters throughout production, and many trucks and SUVs have had suspension components replaced over the years. Vehicle year, trim level, engine, or VIN cannot reliably identify the correct sway bar diameter.

The only accurate method is to physically measure your front sway bar before ordering.

Easy Measurement Without Calipers

If digital calipers are unavailable, you can quickly verify your sway bar size using a standard wrench:

1. Clean a straight section of the front sway bar.
2. Slide a 19mm open-end wrench (or a 3/4-inch wrench) over the sway bar.
3. If the wrench fits snugly around the bar, your vehicle has a 19mm sway bar.
4. If the wrench will not fit, your vehicle most likely has the 23mm sway bar.

This simple measurement helps ensure you receive the correct kit the first time.

Installation Notes

• Measure your factory front sway bar before ordering.
• Select either the 19mm or 23mm kit based on your measurement.
• Fits factory-style front sway bars only.
• Clean sway bar surfaces before installing new bushings.
• Apply the supplied polyurethane grease to all bushing contact surfaces during installation.
• Inspect sway bar brackets and mounting hardware for wear.
• Professional installation is recommended if suspension components are heavily worn.

Available Bushing Colors

Choose the finish that best complements your build.

Black Polyurethane

Provides a clean, factory-inspired appearance that blends seamlessly with OEM suspension components.

Red Polyurethane

Features Prothane's signature performance appearance for enthusiasts who prefer a more noticeable suspension upgrade.

Both black and red bushings are manufactured from the same premium Prothane polyurethane and provide identical fitment, performance, durability, and resistance to oil, chemicals, moisture, and UV exposure. The only difference is color.

Why Choose Prothane?

For decades, Prothane has been a trusted manufacturer of premium polyurethane suspension components. Their precision-engineered products are designed to outperform factory rubber by delivering improved handling, greater durability, and exceptional resistance to oil, grease, chemicals, moisture, and environmental wear. Whether you're restoring a classic Toyota Pickup, maintaining a first-generation 4Runner, or building an off-road trail rig, Prothane suspension components provide dependable performance that lasts.