Pit Stop USA is The Online Motorsports Superstore! Landrum Gold Coil-Over Springs are made of the highest grade of Chrome Silicon wire found worldwide. Cold wound, not hot wound. Each Landrum Gold coil-over spring is properly heat treated and stress relieved to insure the sides of spring remain parallel during installation. We feature Landrum 4" x 2-1/2" I.D. Coil-Over Springs at low everyday prices.