I did the STB, PHB relocation kit and PHB and will say the car is noticeably stiffer in corners and over bumps. I thought maybe it was just me but my wife noticed it being a little rougher aswell and had no idea I added parts. Maybe kits just my car?

 

i'm happy with mine. i have all UMI suspension under my car prior to the install (love all their stuff) but i went with a hotchkis stb because of the looks (it's not just a solid bar across the engine bay) i felt like it tightened up the front end a little but i wouldn't say its extremely noticeable. i also have the eibachs with tokico shocks. handles like a go cart now. i like this setup but it is a little bit rough over some bumps. if i had it to do over again i might look into koni's and strano's. just my 2 cents.