http://www.1stsubarudealer.com/subaru-prodrive-wheels/

Knocking noise on Subaru impreza WRX STI Prodrive?
Can any one help please? my subaru impreza has started making a knocking noise it only seems to do it when you are free rolling out of gear with the clutch down.
It dosent do it when i accelerate, or if theres no presure on the wheels (jacked up) or stationary. the garage has had it for 2 weeks now and has checked a number of things including the gear box and has had no joy in diagnosing the problem. please can anyone give me some idea on what it could be? many thanks
More evidence that the Superpoo Unimpreziv is one of the most over rated cars on the road!
Prodrive P2 – Top Gear