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04-21-2024, 03:06 PM | #1 |
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Custom tuning 135i n55
Hi, I’ve got a 2011 135i n55 and I’m running a stage 2+ mhd tune with a Catless dp, fmic ofc and I want to run a bit more power. I don’t know much about custom tuning but can someone explain how it works and how much more power a custom tune would get me?
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