Sorry for this late response I was out of town this week. I use stock bushings
I really have to do something about that... My car has terrible body roll, look's like the Bilstein HD shock + Bilstein coil springs is not really a ''racing'' suspension
I really need new coil springs, I thawt that H&R Race springs will be a part of resolving my problem.
Another problem was the tires, Continental SportContact 2 are NOT good tire for track days
This problem is solved this afternoon with a set of new Toyo R888 in size 235/40R17
Next track day will be really funny I think !!