I too am running a g even though the revo dealer I went to suggested the d. My brother is also running a g on 2.0tsi on a stage 2 tune and reckons after 3 months it's 'stretched' so has now bought a d to go in, I have told him about the d not holding boost as well but he can't be told as supposedly the tsi guys reckon it's the best option! I'm sticking with my g and I'm on a stage 2+ tune and I will replace yearly