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^and that's why the title reads "up to" 15whp
But you're right. How much of that 15whp stems from the increased map 2 boost and downpipe?
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2017 BSM M2|6MT|Exec|black kidneys and gills|full alcantara wheel|CF spoiler|Dinan Stage 4|Dinan COI|Dinan free flow exhaust with resonator delete|Fabspeed sport cat DP|BMS clutch stop|465 bhp|4.75/5 stars
retired: 2014 435xi|MPPK|335 bhp|3/5 stars
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