I have a brand new set of Tein S.Tech lowering springs for Mazda3 2010-2012. Purchased a year ago and never got to install. Box is open but springs were never installed and are still in original packaging. 

Tein S.Tech Springs are an excellent step towards suspension tuning. They offer approximately a 1.5 inch drop on average 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 North America 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.