Hotchkis Tuning Sport coils offer the performance you seek, and the comfortable ride you deserve. Made from cold wound silicon steel, our springs are variable rate, powder coated seabring silver and include polyurethane bump stops. Front 1 3/8" (35mm) 185 lb/in (160lb/in Stock) Rear 1 5/8" (42mm) 180 lb/in (160 lb/in Stock)