i could be wrong but i read that the kyb gr2 struts are ok for lowering applications.
nope ...
suspension faq said:What struts are available?
Brand/ Model/ Adjustable?/ Lowering Advised?
Koni/ Yellow/ Yes/ Yes
Bilstein/ Sprintline/ No/ yes
B.A.T/ Euro / No/ With BAT or similar springs
Ford/ ST200/ No/ Spring perch is 1" lower, not necessary
KYB/ GR2/ No/ No
Sachs/ Super Gas/ No/ No
Spax/ Sport/ No/ No