i just had my hotchkis sway bars put in today. i definitely notice a difference between those and the trd rear bar/stock front bar. my hotchkis rear is set on the middle and the front is on the hardest setting. i had the dealership do the install-they charged me $60 to install both bars cuz i couldnt do the front myself. do most people have both bars on the hardest setting?

 

My dealership was going to charge me $240...JUST FOR THE FRONT! since I didnt' buy the bar from them. If I had, it would still be $160 and another $100 for the back which I already did. I'll call the other dealership here, cause if I can get it done for $60, I'll pay rather then busting my ___ on that front bar!
But yes, mine will both be on the stiffiest setting.
Oh, and that topic can be found in this post: What do you have your sway bars set on

 

The settings really depend on what you plan on doing with the car. A soft setting up front with a hard setting in the back will encourage the rear wheels to break away before the front do (oversteer). The oposite promotes understeer, where the front wheels break away first. Most people play with the settings until they find a happy medium between the two.