Anyone come across turbo failure because of the wrong exhaust manifold? ( Advice from a well respected tuner.) OR turbo failure because of fuel problems?.( A different well known tuner!.) I am on my third turbo in 13 months, 2 from the same tuner, last one failed at 10 months, and 960 miles, tuner would repair not replace, and I would have to bare the cost.These 2 turbos were from an unknown origin. ( Chinese?.) The new turbo is a Garrett, yet to be fitted. Any thought guys?.