Bullet_point: ['Adjustable Threaded Spring Perch to Accommodate Increased Loads and Maximum Clearance. ERO Off-Road Race Spring Equipped and Compatible.', 'Anodized 6061-T6 Billet Aluminum Mounts, 46mm Piston, Monotube Design with Variable Force Valving.', 'Engineered, Tested and Manufactured by Eibach in the U.S.A.', 'Individually Dyno Tested for Matched Performance and Reliability. Heavy Duty Bushing System also Cycle Tested.', 'Pre-Assembled, Factory Direct Replacement Front Coilover