Cusco 660 464 EV Pillow Ball Rear Trailing Arm Bushing Kit for Subaru WRX STI

The Cusco 660 464 EV Pillow Ball Rear Trailing Arm Bushing Kit is a precision-engineered suspension upgrade designed to replace the factory rubber trailing arm bushings with pillow ball bearings. This kit eliminates the compliance and deflection found in stock rubber bushings, providing significantly improved rear suspension response and handling characteristics.

Key Features:

• Pillow ball bearing design for zero deflection and maximum suspension precision
• Direct replacement for factory rear trailing arm bushings
• CNC-machined construction with high-quality bearings for durability
• Reduces rear toe change under acceleration and braking
• Improves steering response and rear-end stability during aggressive driving
• Engineered specifically for 1992-1999 Subaru Impreza GC8 WRX and 2001-2007 GDB STI models

This upgrade is ideal for performance-oriented drivers, track enthusiasts, and anyone seeking sharper handling and more predictable suspension behavior. The pillow ball design provides a solid, direct connection between the trailing arm and chassis, translating driver inputs more accurately to the rear wheels. Installation requires removal of the factory trailing arm bushings and pressing in the Cusco pillow ball assemblies.