i don't think that related to deleting the mufflers. check any codes and you will find out why it go in limp modeNeed Help !!
my Bmw m5 e39 doesn't rev past 3000 rpm after mufler delete, it seems like the car goes into a limp mode, and when i place back the
regular mufflers the car runs grate !
Any idea on how to solve the problem ?