u/Fearless_Garage6574

Hey everyone! Super new to the bmw world but not new to the car world. I still have a 1993 Mazda rx7 that I’ve fully built. I just purchased a 2022 m340i and I’m wanting to tune it. From what I’ve read so far is that I need to send my ecu off to be unlocked, then I’ll need to purchase a tune. What is everyone going with and why? Thanks