Designed to Maximize Driver Feel BC Racing Coilovers new proprietary digressive piston design offers increased dampening force at low piston velocities while maintaining a linear damper feel at higher piston velocities. One of the greatest advantages of increased low-speed damping force relates to what the driver feels, e.g roll, pitch, dive, and quick weight transitions on technical road courses. This is the key difference between the BC Racing BR series and DR series, but makes the biggest difference where it counts! Key Features include: Mono-tube Shock Design<br/>Digressive Piston and Damping Curve<br/>Satin Chrome Finished Shock Body<br/>30 levels of Damping Force Adjustment (Compression/Rebound) Simultaneously<br/>Pillowball Mounts<br/>Height Adjustable via Shock Body Maintains Damper Stroke At All Ride Heights<br/>One Year Warranty<br/>Fully Rebuildable With All Parts Available<br/>Spring rates 8kg/mm Front, 6kg/mm Rear.