Front Pair Only, Adjust camber and caster
Most factory suspension mounts (the point where the strut or shock assembly meets the vehicle's body) are constructed from rubber or plastic for maximum ride comfort. These mounts can flex and bend hindering suspension performance. HKS' Pillowball upper mounts are constructed with anodized aluminum and stainless steel to form a solid mount between chassis and suspension.
The solid mounting allows your suspension to work at its optimal capacity dramatically improving steering response and also granting drivers a more direct feel of the driving surface. Some applications incorporate adjustable camber plates to offer additional control and tuning.