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Power Mods without changing exhaust
Intercooler
DCI
MHD Stage 1+ e30 tune
If you want more power you either need to go catless downpipes and stage 2 + or upgrade your fuel pump to run higher ethanol blends.
Safety Mods:
Chargepipe
Go with VRSF or any brand you like, I would stay away from ebay stuff but you do you.
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2009 e90 335i AT MHD Stage 2
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