NOTE: This is a (3) location set the covers Right, Left and Center Cross-Member Bushings Why Polyurethane? Polyurethane is an ideal material for performance suspension bushings. Don't get us wrong, rubber suspension bushings are a proven compromise, however in a performance situation additional horsepower, plus size tires and all mix with normal atmospheric conditions and undercar grit and grime to stress rubber bushings beyond design limits. Polyurethane bushings are firm enough to control movement and maintain alignment in sway bars, control arms, and other stressed suspension components without the harshness or resonance associated with solid metal suspension bushings. We believe that after experiencing the precise steering, road feedback and the added firmness polyurethane bushings offer, you'll never go back to rubber bushings.