i've recently found out that Tanabe has released the GF210 lowering springs for the 2004-on, wrx. i believe that the drop is similar to the prodrive kit, 1.3"lowering in the front and 1.0" in the rear. it also claims that it stiffens the spring rate 20-30%. if anyone has any info on these springs(i.e. performance specs and or reviews) please post it here.........