Lowered ride height means lowered center of gravity and this is indeed the reason why track race cars are so low, it reduces tendency for the car body to lean over and also reduces body roll, thus making the vehicle more stable with better handling and allows for faster cornering speeds. The Progressive Tender Spring from Eibach lowers vehicle ride height when installed, but still maintains ride comfort during normal driving. The top end of the coil is softer than the rest, this is to provide a smooth ride for your everyday commuting when the car isn't pushed to its limits. Then as the vehicle is pushed harder and starts to lean, a stiffer and stiffer rate kicks in while the spring compresses. Thus a body roll and nose dive are reduced, cornering speeds are increased, and stopping distance is shortened. This springs are manufactured in the United States and need no wheel alignment after installation.

All Eibach Springs are covered by a million mile warranty. The warranty covers factory defects in materials and workmanship and it applies to the original purchaser of the product who still retains ownership of the vehicle in which the products were installed.

Eibach is a company that produces performance suspension for Formula One, NASCAR, WRC, CART, and so on. On occasion it has been said that they produce the finest performance suspension parts in the world. Eibach and its team of engineers develop products to meet the extreme demands required for any racing circuit. It is made with great precision which makes it very durable and ensures a reliable repeatable performance. When other springs sag and wear out, Eibach keeps on going. They know what professional drivers want from their vehicle, and they strive to create the best harmony possible between driver and vehicle on the road. Thus, drivers feel, lesser body rolls in hard cornering, reduced nose dive during braking, less squatting during acceleration, and a more direct handling with greater handling predictability.

Eibach has supported an uncountable number of race winners over the last 20 years from all genres of racing. This is due to the technology applied in making the product parts, from high strength spring steel alloy, to quality corrosion protection, and advanced CNC winding methods hence producing a products that are durable, reliable, and have optimum resistance to stress.