"My advice for sedans is to use wagon springs and/or using two spring seats. The latter seems to be the only option for wagons. Another way is to use springs that by design drop front more than rear - like Wangans, Provas or TN Guts. All rare JDM only items unfortunately."
To add to unclemat's steller write up. Swift Sport Mach will lower a car on Bilsteins from stock JDM hieght @ 25mm front and 15mm rear.
I'll post up my review of JDM GT REV A's and Swifts after install.