The Super Sport damper has eliminated discomfort resulting from bumps or rough roads. The damper enables you to adjust the ride height and has a 30-way damping adjustment. In other words, your car with this system can be set to meet all different road conditions. This high-performance damper is suitable for both weekend races and daily use. Sold as Off-road use only! The product is in stock and ready to ship! Top-of-the-line sport damper. Monotube design, and lightweight aluminumbottom mount. Full ride height adjustable. 30-way adjustable dampening to be used on different road conditions and weekend race FRONT SPRING RATE 7/392 REAR SPRING RATE 6/336 WELDING Required/ If you want you can send us your E21 hubs and we can weld them in for you= $140 for this service. Please note: Once the product is welded, installed we will not accept a return. All returns must be authorized before return shipping. The shipping cost is paid by the buyer.