The Roush Bilsteins are heavy Duty and have performance valving....A plus is you can get them now for as cheap or cheaper than the Factory Bilsteins...Call Eric @ 734-466-6253
They are on mine and it has a 3 x 4.5 drop...They were the same length as the stock ones extended....Better start thinking bout new brakes...I hammered mine today and with the high speed cornering ability improved drastically...I have to watch out ...
for slow moving obstacles...
Also Ruslow is a good resourse for suspension components and he seems to like the QA1's...If money were no object..this is what I would get..someday maybe..