Austin Healey Anti-Roll Bar Polybush Kit 5/8in – Performance (BN4–BJ8)

What is this anti-roll bar polybush kit?

This performance-grade polyurethane bush kit is designed for the front anti-roll bar (A.R.B.) fitted to Austin Healey models using a 5/8-inch diameter bar. It replaces standard rubber bushes to reduce deflection and improve steering response under load.

Key benefits

• Reduced anti-roll bar deflection compared with rubber bushes
• More consistent bar location under cornering load
• Improved steering response and roll control
• Resistant to oil, fuel, moisture, and road contamination
• Maintains shape under repeated suspension movement

Will this fit my Austin Healey?

Yes, if you have a BN4 to BJ8 fitted with a 5/8-inch front anti-roll bar. This kit suits Big Healey models from BN4 through BJ8 using a true 5/8-inch A.R.B.

• BN4
• BN6
• BN7
• BT7
• BJ7
• BJ8

Does not fit:

• BN1 and BN2 models
• Cars fitted with 3/4-inch, 7/8-inch, or 9/16-inch anti-roll bars
• Blade-type or adjustable competition bars unless diameter matches exactly

Quick check before ordering: a 5/8-inch anti-roll bar measures approximately 15.9mm.

What’s included in the kit?

• Performance-grade polyurethane anti-roll bar bushes
• Correct quantity to service one complete front A.R.B.

Technical details

• Material: Polyurethane (performance compound)
• Colour: Red
• Anti-roll bar diameter: 5/8-inch
• Environmental resistance: Oil, fuel, weather, and road dirt
• Compliance level: Reduced compared with touring-grade bushes

Installation & setup notes

Installation reuses the existing A.R.B. clamps and brackets and can be completed using standard hand tools.

• Light lubrication recommended during fitting
• Confirm bar diameter before installation
• Final tightening should be carried out at normal ride height

A firmer transmission of road feel should be expected compared with touring-grade bushes.

Why choose the performance specification?

The performance compound is intended for drivers who prioritise steering accuracy and reduced body roll. Compared with touring-grade A.R.B. bushes, it offers lower compliance and more consistent behaviour during fast road driving.

View Touring (Black) anti-roll bar polybush kit

FAQs