just fitted coilvers on a 05 wrx, alot of the shuddering and knocking noise from the rear shocks had gone, but there is still a noise, but atleast u dont feel it now when driving about like the old shocks caused, i read somewhere maybe the anti roll bar bushes can creak abit and need lubricated, does this sound right or does anyone have any suggestions.

 

Yeap, I have had creaky droplinks/antiroll bar bushes, so quite likely to be them.