These are the Tein H Tech lowering springs. These aprticular springs are specific for the Subaru WRX/STI Sedan. The Tein H Techs were designed to improve both looks and handling. These were designed and tested in North America to be used with OEM or aftermarket shocks.
Furthermore, these springs feature:
• Chrome Vanadium construction • Progressive spring rate design • Gold powder coated finish • 1-year manufactures defect and sag warranty which covers over 5mm sag, breakage, deformity, and noise. Does not cover powder coating and finish.