Feedback on jbd tune
So after many years of tuning Honda's and VW I decided to give that all up and you can say grow up and I got my first BMW. Its a 2011 335d and although I wanted to leave it as is I can't get rid of that itch to tune the car. I was thinking of the jbd and have been doing search's for days and it all seems positive but the thought in the back of my head of ruining a 40k won't go away. I don't want to void the warranty since it only has 12k on it and have years left. That's where this post comes in a lot of the threads are years old so anyone with it that can spare a few minutes and give me any feedback, issues anything would be very appreciated.