Powerflex Front Sway Bar Bushing - 23.5 Mm - E21 3-Series

Product Details

On a classic track or spirited backroad build like the E21, a functional front sway bar is critical for balancing lateral roll and maximizing front-axle tire footprint. Worn, original fluid-soaked center sway bar bushings flex excessively under load, delaying roll resistance precisely when you transition into a corner. The Powerflex PFF5-1603-23.5H Bushing Set is a premium engineering asset tailored for 23.5mm bars, designed to secure the stabilizer bar's pivot point.

Part of Powerflex’s specialized Heritage Collection, this kit uses an advanced road-biased polyurethane compound that increases material hardness by 25-30% over standard rubber. This eliminates the slop and structural lag inherent to factory bushings under heavy compression. To satisfy rigorous restoration standards, the compound is cast in a stealthy dark slate grey, providing modern track-inspired deflection resistance while keeping an entirely un-modified, period-correct look on the lift.

Technical Features:

• Optimized Stabilizer Retention: Maximizes anti-roll bar efficiency by eliminating structural compliance at the center mounts.

• 25-30% Stiffer Material: Polyurethane formulation maintains strict geometry control under high lateral loads.

• Stealth Aesthetics: Engineered in low-profile dark grey to mimic standard rubber for Concours-level purist builds.

• Direct Fitment: Replaces factory part number 31351126577 for a precise, bolt-on upgrade.

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