Tein S. Tech Springs for the Subaru WRX are an excellent step towards suspension tuning. They offer a more aggressive appearance and increase road holding capability. Designed to be used with OEM or OEM replacement shocks. Each application is road tested in North America for the proper balance between performance and comfort. Please note that 08 and 09-10 WRX models require separate part numbers. 09-up TEIN S. Tech springs are compatible with hatchback body styles only.