Lifetime Warranty Full Set (Qty 4) Shocks Struts Hyundai Sonata Kia Optima Lifetime Unlimited Warranty Designed, Tested, and Built in Korea for Korean Vehicles (Hyundai/Kia) 100% performance tested post manufacturing All components developed, built and certified to JASO (Japan Auto Parts Standard) & KS (Korea Industrial Standard). TS/ISO 16745 & ISO14000 Certified