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Hi there, i installed the M2 lower section airbox (included even on F30 MPPK), for 1 year now. Is not a night and day difference, but better throttle response and more vigorous high end, regard the cons a little bit increse in IAT about 2 or 3 deg Celsius. I run stage 1 MHD, this modification is cheap and has a good value for money, if you plan to go stage 2 i suggest you directly a complete CAI like Eventuri.
Are important modification in the induction system fluid dynamics also the Turbo intake Pipe, Intercooler and charge pipe.
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2015 BMW M135i F20 LCI, man box, adaptive, HK, decat, MHD Stage 1, F21 underbrace retrofit, MP LSD, M4 LCA & TS, M Performance BBK, MSL oil Tstat, MPPK Airbox, CDV delete, Wagner EVO II, FTP CP, MST V2 turbo inlet, M2 sump and pumps.
... "beauty is the splendor of truth"...
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