Danny,
I have 405/630 power / torque from JB4 and hi flow DP so you should be able to get 420/600 from a remap.
If wanting to keep it "safe", I'd ask remapper not to go above about 16psi boost so as plastic stock intake charge pipe from intercooler to throttle body does not fail.
BP
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Fettled M135i EB AT then AW M2 DCT - both gone but not forgotten:
Current '22 X3M LCI..
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