I am curently looking at buying a 1990 type m r32 gtst and was wondering if the airbox is meant to make a loud spooling noise i am worried that the turbo might be on its last legs. It does not blow white smoke and only has done 70,000 kms i am just worried and dont want to spend extra money on a new turbo, if any one still has their stock airbox on and has this same noise please let me know. cheers