PowerFlex Rear Upper Arm Inner Bushing - E60, E63, E53, E39

Product Details

In high-stakes motorsport, precision isn't just about speed—it's about predictability. The Powerflex Rear Upper Arm Inner Bushing is engineered specifically for competitive track environments where standard OEM rubber components fail under extreme lateral and longitudinal loads.

Designed to eliminate un-sprung compliance, this component locks down rear-toe geometry during hard braking, aggressive corner entry, and high-speed acceleration. By replacing the compliant factory rubber with our proprietary high-durometer polyurethane compound, drivers experience instantaneous chassis feedback and significantly improved rear-end stability.

Key Technical Features

• Zero-Toe Deflection: Eliminates dynamic rear-toe changes under heavy cornering loads, ensuring a stable, predictable contact patch.

• Advanced Material Science: Molded from Powerflex’s signature rigid compound to withstand fluid exposure, high temperatures, and continuous track abuse without degrading.

• Internal Knurling & Grease Grooves: Engineered with internal cross-hatching to retain specialist polyurethane lubricant, reducing friction and preventing binding through the suspension stroke.

• Stainless Steel Sleeves: Equipped with corrosion-resistant, high-tensile steel inserts to handle high torque specs and ensure perfect concentric alignment.

Prop 65 Warning

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Lifetime Replacement

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