SuperPro Rear Control Arm Lower-Inner Bushing Kit | 1990-2021 BMW 3 Series/Z4 (SPF2421K) YMM_2020_2026_Chevrolet_Corvette_C8 The springs feature a progressive

The springs feature a progressive spring rate that balances sporty handling with ride comfort

The double offset design ensures that your vehicle benefits from enhanced positive caster

Carbon fiber rear diffuser

but they also contribute to aerodynamic efficiency by directing airflow more effectively around the front of your car

2020 BMW M4

SuperPro Rear Control Arm Lower-Inner Bushing Kit | 1990-2021 BMW 3 Series/Z4 (SPF2421K) YMM_2020_2026_Chevrolet_Corvette_C8 The springs feature a progressiveSuperpro 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