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Make sure the MAF's aren't backwards. They're directional. Also make sure your filters are up to snuff and can actually ingest the required amount of air. Those filters look a tad small tbh
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2015 BMW 535xi
Bootmod3 Stage 2 | ER charge pipe | ER Catted DP | Remus Exhaust | Gplus FMIC | KW V3 | Turner Monoball thrust arm bushings | Wallet regrets
ISTA VM Setup/Tutorial
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