The first time you put it in, leave yourself some extra time. After that, it just gets easier every time. At this point, I can install and uninstall the JB4 in less time than it takes the Accessport to reflash the ECU. The AP is very convenient, but the install on the JB4 as you said isn't all that bad. I've never done it on an N55 car, but I imagine it's of similar difficulty.
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2022 X4 M40i - 2008 135i - 2015 F700GS
On Order - 2024 i4 M50
Scruffy's gonna die the way he lived... Mmhm.
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