Tein S.Tech Springs are 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. Each application is road tested in the UK 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 be clear of any manufacturer defects.Product Features: Improved handling Reduced ride height Rubber silencer sleeves on certain applications Compatible with factory or aftermarket replacement shock absorbers Lowering Specification: Spring rate (Front / Rear): 3.7 / 4.6 kgf/mm Ride height drop: Front -30mm, Rear -30mm Fits the following vehicles: Toyota GR86 ZN8 (2022-2024) Fitment Notes: Front: cut bump rubber at 18mm from the bottom and use the upper portion. Rear: cut bump rubber at 15mm from the bottom and use the upper portion.