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      01-12-2020, 02:51 AM   #3
bimmer456
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Drives: 340i
Join Date: Nov 2016
Location: Pasadena, CA

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Bootmod involves no physical mods to the engine. You can get some pretty decent gains with that or bolt on JB+ without spending too much. Or get a used N55 or N54 and tune that for about the same or less money and you have a faster, better sounding car as well.
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