I think I'd do it though but that's just me. My first Z was a TT yellow 2+0 auto. I swapped in a manual transmission after though and its not that hard to do with the tools and help. I was too lazy to figure out the wiring to have it not start when the clutch is pedal is not pushed down. Other than that yeah worked perfectly fine. So its not gonna be a straight trade exactly once you factor in the time and money for that. I honestly could not tell the power difference between auto TT cams and manual TT/NA cams as well as difference in turbo lag at all. Usually TT auto's engine's aren't over rev'd as much as compared to manual engines so that might be something to consider as well. But really can't tell. I'd also test drive it obviously... maybe other things might need changing.
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