Help! Hollow Clunk

[PCspeed3]

hi everybody, So I have about 800 miles on my Speed 3. I installed the Cobb rear sway bar a few days ago and today i noticed a clunking sound from the rear end when I hit bumps. I got under it awhile ago and checked all the nuts and bolts for the sway bar and they are good and tight. Has anybody else had this problem? What can do/check to fix the problem? (help) Thanks in advance!

 

[Kain]

Since there is some play in the brackets, crawl back underneath and see if the bar is making contact with the center plate. And, as much as this goes without saying, make sure the bar isn't upside-down (yes, this has happened to some people).

If it's rightside-up and touching the center plate, loosen all the bolts, push the bar up as high as possible, and retighten while you have the bar pushed up.

 

[jam_asian85]

It might be your stabalizer nut being loose, here's a thread about it:
http://www.mazdas247.com/forum/showthread.php?t=123666162