Thread: JB4 on the M2
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      01-10-2018, 12:51 PM   #4
TT1351
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From what I have read, the N55 M2 motor is pretty evolved as delivered as far as power goes, so while a JB4 will produce decent results on a M235, the fueling issues at higher RPM's is the limiting factor for the M2, so you will see gains, but nothing close to say for instance a JB4 on an N54 motor. I believe this is one of the reasons that even with an ECU flash getting past 400 hp, even with an inter cooler and down pipe has been a tough nut to crack. Just my two cents.
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