Hey guys ive been getting some pretty bad rev hang when up shifting (esp. at WOT). So today i decided i would take it off and cleaning it to get some hand on experience and see if that would help. Got some TB cleaner from autozone, and needless to say there was a huge build up behind the butterfly valve, it worked pretty well, havent installed it yet. I figured id go ahead and remove the intercooler and clean it as well. When i took off the y-pipe i could see a streak of oil residue in the right flange going down the curve. Im concerned this may be a turbo leak. I called 2 shops 1 said the same thing after i reported the symptoms, the other (mor familiar with boosted cars) said it was normal. What do you guys think?