Tein Street Basis Z Coilover Kit 2003-07 Infiniti G35 Coupe / 2003-06 Infiniti G35 Sedan / 2003-08 Nissan 350Z (Including Convertible)Tein Street Basis Z Coilover Kit 2003 07 Infiniti G35 Coupe 2003 06 Infiniti G35 Sedan 2003 08 Nissan 350Z (Including Convertible) About the Sealed Structure The top end of the shell pipe is narrowed, oil and gas are injected, and the whole unit is sealed by crimping the metal. This new approach massively shortens the production process. As a result, we have succeeded in vastly cutting production cost. Thread Type Ride Height Adjustment The ride