Quote:
Originally Posted by LongBeachDinanFan
They are the same if you don't install half of the JB4 connections but you are not going to match the performance of a full JB4 by only installing half of it or running RaceChip. Either one is better than factory.
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Interesting! Thanks!
I’ve read about lots of folks really enjoying it on their m5s. It seems to make serious power.
Most of the issues I’ve heard about are with much cheaper cars like 335s and m3/4.