Volvo 700 and 900 series models suffer from an inherent front suspension problem related to the cone-shaped control arm stay bushings. As the bushing weakens, it allows the lower strut assembly and wheel to move a considerable amount, altering the front-end alignment. This allows the strut assembly to shudder under brake loads and decreases handling stability. Over the years, we’ve experimented with several different polyurethane formulations in this bushing and have developed a good replacement that improves the performance and life expectancy without adding undue harshness or vibration. Unlike most suspension bushings, these bushings do NOT need to be pressed in. You may hear of this type of bushing referred to as a: poly bushing, urethane bushing or plastic bushing. Those terms are all slang references to the same bushing material. Polyurethane offers the advantage of being impervious to grease and oil, and therefore doesn't degrade from the common contact with those substances.