Part #: KCA425M. The Whiteline anti - lift caster kit for Subaru WRX and STI models is a game - changer for vehicle stability. In standard form, the STI's front end tends to shift, leading to unpredictable handling. When accelerating, the front end lifts, and during hard braking, it dips. This Whiteline kit, often called the WALK kit, keeps the front end firmly under control. It gives drivers more predictable handling. This version features a metal bearing to minimize deflection and adds a 0.5 - degree positive caster. However, be aware that using spherical bearings may increase noise and harshness.

Using the Whiteline anti - lift caster kit is straightforward. First, make sure your vehicle is on a stable surface and safely lifted. Remove the old components and replace them with the parts from this kit following the included instructions. When driving, you'll notice better stability right away. Keep in mind that due to the spherical bearings, there might be more noise and a bit of harshness, but that's normal for this type of setup. For maintenance, regularly check the kit for any signs of wear or damage. If you notice any unusual noises or handling issues, it's a good idea to inspect the kit. Clean the metal bearing occasionally to ensure smooth operation. That's all there is to it, and you'll enjoy a more stable and predictable driving experience.