Whenever you decide to lower your vehicle with either coilovers or lowering springs, it is recommended to get a quality Front Roll Center Adjustment (ball joints & tie rods) Kit, like the one from Whiteline. This specific roll center kit consists of 2 steering arm tie rod ends, 2 ball joints, and it will help correct your suspension geometry by raising the front roll-center geometry after you have lowered your vehicle. This will help improve on the original bump-steer geometry as well for improved handling and to make the most out of the rest of the suspension on your vehicle. Without this kit, a lowered car's suspension geometry is out of spec.
The way that these work are that the Whiteline ball joints are physically longer when compared to the OEM units. Once installed into the control arm, it will push the control arm down to keep the factory suspension geometry settings as close to OEM as possible. Additionally, the tie rod ends included in this kit are taller in comparison to the OEM units and will come with heavy-duty boot covers for heat resistance near the brake rotors where there is chance of degradation via heat cycles.
Whiteline conveniently includes new castle nuts and pins to make the Front Roll Center Kit a complete swap-in kit with nothing else needed.
Current offerings for this product are For Subaru, Mitsubishi Evolution 8-10 and 86 applications.