I have a MY08 WRX and my car makes a flutter sound as well 2500 - 3000rpm when accelerating. The turbo spins up which sounds great then the ticking/flutter/leak starts up :-( My
TBE was fitter by stechnic and its been back to check the noise. They took the dump off and said it was leaking a bit from the dump gasket. They replaced that but i can still hear it. Its not a noticeable now but its still there. I will take it back when i get a chance.
Keen to see if the actuator fixes the problem.
Jez