SuperPro ALOY0015K Front Lower Alloy Control Arm Kit with Caster Offset for Select Subaru WRX/STI 2008-2021

Fits select 2008-2021 Subaru Impreza WRX, Impreza WRX STI, WRX, and WRX STI models.

The SuperPro ALOY0015K front lower alloy control arm kit is a comprehensive performance upgrade engineered to replace heavy factory steel arms. This kit optimizes front-end geometry by adding positive caster and anti-lift characteristics, which maintains a more consistent tire contact patch during hard acceleration, cornering, and braking. The high-strength alloy construction provides superior rigidity and a reduction in unsprung weight for improved suspension response.

These arms come ready for installation with SuperPro polyurethane bushings pre-installed in the forward position and a specialized DuroBall caster offset bushing assembly at the rear. To streamline the swap, SuperPro includes new OEM-style ball joint bosses, which are often prone to seizing on factory Subaru arms.

• Manufacturer Part Number: ALOY0015K
• High-strength alloy construction for increased rigidity and weight savings
• Pre-installed SuperPro polyurethane forward bushings
• Rear caster offset DuroBall bushing assembly for improved geometry
• Anti-lift geometry helps generate greater grip and traction
• Includes replacement ball joint bosses for a trouble-free installation