This design provides reduced deflection, increased articulation, and an all-around improvement in performanceBMR's suspension designed the UCA763 to work well in street performance, drag race, and road race applications. The stock control arm bushings deflect under cornering loads giving you inconsistent handling characteristics. BMRs Delrin bushings are designed to eliminate deflection, while being able to stand up to high loads of any performance environment. The UCA763s heavy-duty construction and strong solid Delrin bushings give you much improved repeatability on the street, starting line, or in the corners. The UCA763s are primarily designed for lowered cars that are looking to remove the negative camber gained from lowering the cars. These arms are adjustable and give you the ability to correct the camber setting on lowered S550s. ALL cars will benefit from these adjustable upper control arms. These are the perfect upgrade for the enthusiast looking to improve performance at an affordable price, while maintaining acceptable NVH levels and ride quality. When performance is a must, rely on BMR's suspension!BMR's suspensions UCA763 adjustable polyurethane upper control arms are available in a durable black anodized finished for long-lasting good looks. Installation time is about 3 hour. Proudly made in the U.S.A.