Whiteline Front Radius Arm Lower Bushing Kit for Select BMW 2012-2021 (KCA473)

Fits select 2012-2021 BMW 1, 2, 3, and 4 Series models, including M235i, M240i, and M3. This Whiteline caster kit is engineered to optimize steering geometry by increasing static caster and dynamic negative camber gain, significantly improving cornering grip and vehicle straight-line stability.

Constructed from high-grade synthetic elastomer, these bushings replace worn OE components to deliver sharper steering feedback and more consistent braking performance. The design features precisely placed dampening and articulation voids, which allow for necessary suspension movement under load while filtering out harsh road vibrations. All metal components feature protective plating to resist corrosion and weathering in demanding environments.

• Precision Alignment: Engineered to alter caster alignment for a maximized tire contact patch during cornering.
• Advanced Lubrication: Internal grease reservoirs provide continuous self-lubrication to manage friction and prevent noise.
• Durability: Synthetic elastomer formulation is resistant to oil, grease, ozone, and environmental weathering.
• Installation Ready: Includes extreme pressure molybdenum disulphide (LM) based grease and a detailed installation guide.
• Part Number: KCA473