I used the simple expedience of using a cut off wheel to trim 13 CM off the bottom end of the coils. I did some measurements with the wheel free from any springs, and confirmed to my satisfaction that there was plenty more drop available before things started bashing into one another. If I were to do it over, I would probably only cut 7 cm off, so it would fit more cleanly on the lower spring perch, but only do this after they are well and truly broken in. Wouldn't want them to settle unevenly. I will say that a lot of people would be shocked and upset at the notion of cutting springs, but done very conservatively its not a huge deal. There was no noticeable change in ride quality, and the change in handling was predictable as a result of changing the rake of the car.
No longer own: '12 V6 Perf, from Sept '11.
Mods: TWM 520g Piston shift knob & Barton shift bracket, AM short shifter. SR 1.5"drop & AM street phb. Tokico D-spec, Whiteline bars F&R, J&M Lca, 25mm wheel spacers, 18x10x4 Bullit style on Sumimoto rubber. Magnaflow Street's. 25' of b-quiet ultimate, 10" JL [email protected] 350w, JL TR's upfront. Bama Tune, B&M 73mm & Shorty headers.
Someday..... Twin Turbo, or SC goal is 450 whp. Has to wait until warranty is up