Whiteline Suspension KCA425M Motorsport Anti-Geometry Control Arm Bushing Kit

The Whiteline KCA425M is a motorsport-grade anti-geometry kit engineered specifically for 2011+ Subaru WRX STI models. This performance suspension component replaces the factory front control arm rear vertically-mounted bushing with a precision-engineered solution designed for competitive motorsport applications.

Key Features:

• Lightweight aluminum housing construction reduces unsprung weight
• High-performance, low-compliance bearings provide optimum dynamic alignment under extreme loads
• Adjustable geometry tuning from anti-lift to anti-dive using included spacers
• Positive static caster gains achieved through offset bearing orientation
• Stealth black finish for a professional motorsport appearance
• Significantly reduces compliance for improved handling precision and response

Adjustability and Tuning:

The KCA425M features a unique tuning system that allows drivers to adjust suspension geometry characteristics using a combination of recommended spacers. This provides a broad window of handling behavior to accommodate varying track conditions, vehicle setup requirements, and driving preferences—making it ideal for competitive motorsport environments where fine-tuning is essential.

Application Note:

This is a motorsport-only component designed for track use. It is specifically engineered for Subaru WRX STI models (2011+) and does not fit standard WRX applications. The low-compliance bearing design prioritizes performance and precision over street comfort.