Tanabe have completed development of their Sustec GF210 coil springs for Nissan GT-R recently. GF210 springs offer a lower ride height and improved stiffness over the standard Bilstein springs. On the GT-R they lower the car 17mm at the front and 16mm at the rear. Spring rates are 10kg/mm front and 7kg/mm in the rear.

These should be available soon at Tanabe USA dealers at reasonable prices.

Source: NAGTROC
Link: Tanabe USA