N55 stage 1 tune options
Just piked up a 2011 E90 335i, and while im not gonna mess with it just yet, i do know that down the line a tune is in the works. I do plan on doing the chargepipe since its only a matter of time before it fails, and maybe a downpipe.
Goal will be sleeper, so im not trying to do any crazy stage 2 or 3 stuff. Just wanna get the most out of the car while keeping as close to stock as possible.
What stage 1tunes are the go to for the n55?