I elected not to get a special intake but just drop in an ITG flat panel.
I just put the Milltek exhaust manifold on last week, coupled with a Milltek cat-back.
Then Saturday I flashed the ECU with the MTH tuner file I got (targeted for 93oct, ITG,Milltek,Milltek)...

I'm only 50 miles in and WOW (and of course wouldn't you know it, slow leak in one of the tires turns out not repairable, so the ECU will have to wait just a bit longer to 'keep learning').

I'm really pleased so far with limited time since flashing.

Can someone help me understand the 'learning' process ?

Do people generally flash the stock program before going to the dealer for service ?

I'm assuming I'll see no long-term mechanical issues as a result of this work ?