Bilstein B12 Suspension System - BTS Kit The Bilstein B12 - BTS Kit is the perfect combination of sport dynamics and superior appearance and high performance for your car. The BTS Kit will provide a dramatic increase in your vehicle's handling because its sport level valving is tuned for better road handling and control. The product benefits at a glance: Precise responses, excellent driving dynamics and added safety Uniform lowering of approx. 30 mm Quality sport springs made from highly durable material Springs and absorbers are road-tested by Bilstein engineers to complement one another perfectly Gas pressure technology Bilstein monotube technology, made in Germany Download the product PDF Download the application guide PDF Monotube Technology - the Number-One Choice in Motorsports The original and best mono-tube gas pressure shock absorbers all wear the Bilstein name, because Bilstein shock absorbers are the best there is. The number-one choice in motor-sports and for series-production sports cars, the monotube shock absorber has a unique design that affords the freedom to choose the ideal installation position or location. Monotube shocks feature a large surface on the working piston which increases the damping power and provides better handling. The design of the monotube shock improves the dissipation of heat which improves the life of the shock and enables a consistent and dependable level of absorber performance. Bilstein's Upside-Down Technology creates a safer functioning shock absorber. Gas Pressure Technology - Full Damping Power Under Extreme Stress Bilstein's gas pressure technology has become an established standard in the automotive industry. By employing a chamber of high pressure gas to keep the oil in the absorber under pressure, Bilstein's Gas Pressure Technology prevents the shock from becoming over-heated. Over-heating can cause the oil within 2 Year / 200,000 mile warranty.