Subaru Impreza WRX STI (GDB-F, 2004–2007). The hawk-eye STI, a focused all-wheel-drive performer. Shop handbuilt JRZ coilovers built for the WRX STI, custom-valved with adjustment options up to 3-way double-adjustable, from spirited street driving to full race use. As the official U.S. JRZ distributor, we help you spec the right kit and valving, with expert setup support and fast shipping.