The stock steering rack bushings are soft, allowing for the steering rack to have excessive movement. This movement disconnects the driver from the valuable feedback provided via the steering wheel. By upgrading the bushings you will notice quicker initial turn in and a better driving experience. As with all harder bushings, a bit more noise and vibration will be transferred into the vehicle compared to stock.
Note: Measure the OE passenger side bush retaining bracket. The 25mm wide examples use KSR200. The 30mm wide examples use KSR202.