If you do some searching on the Eibachs for the MS6 (which are in fact the same as the 6s V6) you will find people claim the rear is real sloppy compared to stock. The Megan Racing springs are a much better option in that price range but drop the car about 2". AutoExe also makes springs specifically for the MS6 which provide somewhere around 1" drop and RPM is coming out with springs soon which will provide a similar drop at about half the cost of the AutoExes