Originally Posted by caterpill
...10lb Cusco Chromoly flywheel...
Well, there's your problem right there! Not really a problem, but the newer USDM wrx gearboxes often sound like hell with a lightweight flywheel... and from what I've read it seems to get worse as the flywheel gets lighter. In fact, subaru was sometimes installing even heavier flywheels under warranty shortly after the US debut of the wrx to calm the decel noise and shudder folks where complaining about (My car's original owner told me that mine got it done a couple of years back). I've heard that noise in another wrx with a 12lb. flywheel before, sounds about right.