The TEIN S.Tech Springs for your WRX or STi is an excellent step towards suspension tuning. They offer approximately a 1.5 inch drop for a more aggressive appearance and increased road holding capability. Designed to be used with OEM or OEM replacement shocks. Tein S.tech springs are road tested for the proper balance between performance and comfort. Comes with a 1 year limited warranty, spring length is guaranteed not to sag more than 5mm, and will clear of any manufacturer defects.