Under normal driving conditions you'd be OK.

If you took a corner extra fast you may find you have more oversteer than you'd like to have. Most front wheel drive cars tend to naturally understeer when cornering fast so a stiff rear bar might make your car behave the opposite. Generally it is safer to have understeer than oversteer (the back end swings out and looses traction).

Whenever doing suspension upgrades you should always seek to balance your upgrades to the purpose of your driving needs. Not too stiff nor too soft. Having adjustment holes in the rear bar will help alot unless the bar is very stiff as in the case of the H-sport comp bar.

 

I put a 22mm rspeed bar on my MC. Middle setting is to aggressive on the track.

I moved it to the softest setting with better results. I'm hitting the track again in a few weeks.

Randy, what would h-sport springs do for me with an r-speed on the soft setting?

 

Over steer is more fun though . One of the main things I miss about my 325i