Performance Suspension '08-16 Mitsubishi Evolution X (CZ4A) Spring Rate: (Linear Front & Rear) Front: 9.0 K Rear: 9.0 K Adjustment Range: Front: 20-55mm Rear: 15-45mm Front adjustable spherical-bearing upper mount Features: 18way Externally Adjustable Damping Aluminum Spherical Bearing Upper Mount (Front) Low Profile Helper Spring Set-up Hardened Chromed Piston Rod Low Friction Twin-Tube Dampening Compression Bump-stop with Integrated Dust Boot Height Strength Linear Race Spring Corrosion-resistant Composite Spring Seats Galvanized Strut with Continuous Threads Includes all necessary components, adjustment tool and installation instructions