Tein H-Tech Springs for 05-07 Subaru STI
Part#: 

High Tech is made from a new material called "Vanadium" which is much lighter then other spring and increases flexibility.

*Features*
* All spring are designed specifically to fit each car for maximum performance
* About a 1 inch drop for a more attractive appearance
* Comfortable ride quality is still maintained by using the OEM bump rubber and noise protection sheet (available for most model)

FITS:
2005-2007 Subaru STI

Spring Rate (F): 252lbs/in (4.5kgf/mm)
Spring Rate (R): 230lbs/in (4.1kgf/mm)
Ride Height (F): -1.1in (-27mm)
Ride Height (R): -0.6in (-16mm)