SPC Performance Upper Control Arm Front Left | 2017 - 2020 Audi A4 & 2018 - 2020 Audi S4 (81381)

The SPC Performance Upper Control Arm Front Left is an adjustable control arm designed for the Audi B9 platform, covering 2017 to 2020 Audi A4 and 2018 to 2020 Audi S4 models. Crafted from forged aluminum, this control arm allows for precise camber and caster adjustments of up to ±1.5°, enhancing handling and alignment capabilities. It features OE-style booted ball joints and bonded rubber bushings to preserve the factory ride quality, noise, vibration, and harshness parameters. This component is engineered to improve suspension performance, especially in tracking and cornering scenarios, by enabling fine-tuning of suspension geometry for better grip and stability.

Specifically tailored for front left fitment on the specified Audi models, this control arm is compatible with vehicles equipped with multi-link suspension systems that create a 'Virtual' SAI. While the factory does not specify caster angles, SPC recommends setting caster between 5° and 6° for optimal tracking and handling. This upgrade is ideal for enthusiasts seeking improved suspension adjustability for street or track use. Installation is a direct replacement, maintaining OE mounting points and compatibility. The kit includes the forged aluminum control arm, ball joint, and bushings, making it suitable for performance tuning and suspension refreshes on these Audi models.