I have a 10th anniv. vert. w/ 5000 orig. miles & 615RWHP (I'm the 2nd owner- bought car w/4500 miles) & have been trying to get rid of the wheel hop since I bought the car. I have read the red pill & changed all bush. to either poly. or alum. & put on diff. brace. The car came w/ eibach springs when I bought it ( I dont know the spring rate on the rears or if eibach distinguishes between coupe or vert.?). The first time at the track I broke a halfshaft...ooops I think I should have let out of it. So now I am putting in level 5 DSS shafts w/ upgraded inners and H&R race springs & I am thinking about trying QA1 adj. shocks as well. Can anyone give me any input if they have used these shocks or if they think they will help or should the stiffer spring be enough? Sorry so long and thanks for any help.