For Pontiac Grand Prix Suspension Lowering Springs (Red) Improves handling, responses and balance Lowers the center of gravity to improve performance and increases stability Reduces squat during acceleration, body roll at corners and excessive nose-dive under braking Constructed of SAE 9254 chromed cold wounded steel and powder-coated silicon color polished finish for maximum durability Drop Rate - FRONT: 1.70", REAR: 1.50"