bpp

H Sport S4 bar is 24mm. You'll see a huge improvement going to the 24mm rear bar only. You go to the 29mm RS, you must go to the full set or you will have problems swapping ends under certain conditions. NO need for a stiff setup (RS4) on the A4 as you have about 250# less to haul around than the S/RS. You'll be fine along with your upgraded coil set you have. <ul><li><a href="http://www.hotchkis.net/c-811-s4-04-07-b6b7.aspx">clicky</a></li></ul>

Mrkrad

definitely worth 100 bones for rs4 sway setup

Zorfunk

I started with an RS4 rear sway and I just swapped it for H-Sports, NIGHT AND DAY!

AvantMnkyA4

thanks MikTip. was just too lazy to STFA, haha