Hey guys ive got an 05 gti lowered with fk coilovers on 18inch 3sdm wheels. Had this set up for roughly a year. In the past few months the car has developed an annoying knocking over bumps. Its not overly loud but i can tell its there. I changed the anti roll bar links and trailing arm bushes ( pain in the arse) last weekend but the noise is still there. The back end also feels a little twitchy over uneven ground. Any ideas what it could be? (Its not the parcel shelf rubbers! As ive driven with the shelf out :)