SuperPro DuroBall Front Lower Inner Control Arm Bushing Kit for Subaru WRX & STI 2015-2025

Fits select 2015-2025 Subaru WRX and WRX STI models.

SuperPro DuroBall control arm bushings are engineered to solve the inherent trade-off between performance and comfort. By encasing an isolated spherical bearing within a proprietary polyurethane shell, these bushings deliver the precise articulation and steering response of a bearing-style design while maintaining the noise, vibration, and harshness (NVH) mitigation expected of a street-driven vehicle.

Worn factory rubber bushings allow for significant deflection and dynamic alignment changes under load, leading to vague steering, increased tire wear, and poor handling. The DuroBall assembly (DURO4425K) replaces these soft OE components with a durable, Australian-made solution that is resistant to extreme temperatures, oils, and road contaminants. This kit is especially effective for vehicles with larger wheel and tire packages or upgraded braking systems that put additional stress on the front suspension pivot points.

• Proprietary engineering-grade polyurethane formula for superior durability
• Isolated spherical bearing provides precision steering and maximum articulation
• Maintains OEM levels of noise and harshness isolation
• Unaffected by extreme temperatures, oils, water, or coolant
• Standard alignment configuration (Std. Alignment)
• Designed, engineered, and manufactured in Australia
• Manufacturer Part Number: DURO4425K
• Limited Lifetime Warranty