Hi done my head gaskett last week due to whithin one hour of buying the car and on the way home lost one cylinder due to exhast valve damge due to cheap plug electrode braking off and jammming exhast vale open and burnning it out, and on stripping down the air induction side back to my turbo, checked the turbinne on the induction side it is steel, does this mean the the turbo has steel inturnals or will there be a ceramic turbine on the exhaust side, any advise would be apreciated to save me taking the exhaust side off to see. thanks in advance