SuperPro Rear Control Arm Lower-Inner Bushing Kit | 1990-2021 BMW 3 Series/Z4 (SPF2421K) Exterior Styling

SuperPro Rear Control Arm Lower-Inner Bushing Kit | 1990-2021 BMW 3 Series/Z4 (SPF2421K) Exterior StylingSuperpro Rear Control Arm Lower Inner Bushing Kit 19902021 BMW 3 Series Z4 Part #: SPF2421K Overview The SuperPro Rear Control Arm Lower Inner Bushing Kit is designed to restore and enhance the suspension performance of your BMW 3 Series or Z4 from 1990 to 2021. These bushings play a critical role in maintaining proper suspension geometry, ensuring your vehicle handles precisely and responds predictably during spirited driving, daily commuting, or

making it ideal for aggressive street driving and occasional track days

while the steel backing ensures structural integrity under high torque loads

Featuring a Teflon liner to provide quiet operation

these springs provide a lower ride height that reduces body roll and improves cornering stability

it is significantly lighter than the stock diffuser—approximately 0

maintaining their appearance even after prolonged use

providing a complete suspension upgrade for your BMW 328i

Corrosion-resistant coating for long-lasting performance

Enhance the rear aesthetics of your BMW 3 Series with this Hamann style carbon fiber diffuser

The lip is designed to complement the F30's lines

Includes the carbon fiber front lip component

The shocks are engineered with exacting tolerances and undergo rigorous quality control testing to guarantee a perfect fit and reliable operation