Ran the 87 535is (97k) I bought about a couple weeks ago up to 138mph and didnt hold the road like im am used to with other cars I have owned.It still has the stock TRX's (new tires and stock sway bars. What would be the greater handling improvement replacing the TRX's or or to install a good set of swaybars.This is my first 535is so I am unsure what to expect.