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BM3 imo is the best bang for buck, DME/RK would be second best. I already had the jb4 and i mostly use that to push the boundaries and log with DME flash. I can use race gas and bump the boost right away with jb4 so thats where it comes in handy. If BM3 was available before i woud've gone for that but all tunes are more or less the same so it doesn't bother me much.
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2021 M5 Competition | Imola red
2020 Z4 M40i | Misano blue Pure850/PI/LPFP
Gone: 2018 M550i xDrive | DME Tuning BEF / JB4 / BM3 / DPs | 10.95 @ 125 1/4 Mile
Gone: 2014 335i xDrive | Bootmod3 Stage 2 93 Map | 12.2 @ 113 1/4 Mile
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