Quote:
Originally Posted by AJG1137
Burger Motorsports has a beta piggy back tune for the f30 328i. It's under $400 and offers comparable gains. Plus, their customer service and transparent testing and development are excellent. In my opinion, this is a better value.
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I think twice with BMS stuff, had it for my N52. Started to get weird engine lights and my cat sensors went cause the PBX was running too rich.
Piggyback's suck.
But if something from Hartage or Kellener I would trust.