So I put a adj cuscu rear sway on the my sti and every time I take a left I hear a clunk or like a snap. Any help would be great.

 

might want to tear out the back seat and check it out back there. i actually think i tightened the bolts too tight on mine....heard a pop. so it might've broken.

who knows. might as well check it out

 

I'd check the bolts on the bar mounts and on the endlinks. My stock endlinks were pretty mangled...

 

Are your endlinks tightened up? Your stock ones need to be torqued to I believe 36 ft.lbs...I used these same torque specs when I installed my Perrin rear endlinks with my rear Perrins sway bar...

Only thing is, as soon as I put both of these on, my rear started clunking...drove me nuts for days...endlinks on, endlinks off...etc.

Finally traced it to the spherical bearings in the endlinks...they were binding...I tried all sorts of torque settings with no luck...I finally sent them back to Perrin and it appears that they just doused it with WD-40 (smell) and worked the spherical bearings in (if you can imagine...two screwdrivers swiveling...working the delrin/metal contacts)....well, it stopped clunking...

I do not and have never had any clunking issues with the stock endlinks...

 

thanks