BMW E46 M3 Rear Sway Bar Bushing - 21.5 Mm

Product Details

Engineered for the track but styled for the purist, the PowerFlex Heritage Collection delivers modern polyurethane performance without compromising the classic aesthetic of your BMW.

Standard rubber bushings deflect under heavy cornering loads, leading to unpredictable dynamic toe changes, vague feedback, and a sloppy rear end. The PowerFlex replaces the soft factory rubber with a proprietary 78A durometer polyurethane formulation. It matches the performance characteristics of their standard Road Series (Purple) compound but features a subtle "Dark Grey" finish that blends seamlessly into a restored or OEM+ underside.

By stabilizing the 21.5mm rear sway bar, this bushing ensures instant anti-roll bar activation, flatter cornering, and razor-sharp transition response—all while keeping NVH (Noise, Vibration, and Harshness) levels perfectly in check for the drive to the track.

Key Technical Features

• Precision Engineering: Molded to exact tolerances for a perfect, slop-free fit on the factory 21.5mm rear sway bar.

• Heritage Grey Compound: Premium 78A durometer polyurethane offers up to 25-30% increased stiffness over aging rubber while maintaining a concours-correct, stealth appearance.

• Knurled Bore Design: Internal grease retention grooves trap the supplied high-pressure fluorosilicone lubricant, ensuring lifetime squeak-free operation.

• Advanced Material Science: Immune to ozone, oil, fuel, and road salt degradation. Unlike rubber, PowerFlex polyurethane will not dry out, rot, or crack.

• Lifetime Warranty: Built to outlast the chassis. Backed by the PowerFlex lifetime guarantee.

Fitment Note: We recommend measuring your rear factory or aftermarket sway bar to determine which size of bushings are required for your vehicle. Sway bar sizes can differ depending on factory suspension packages and aftermarket sway bar brands.

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