US-spec 128i Air filter replacement. The DIY nobody needed. - BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
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How to remove intake manifold on BMW F10 F11 530d N57 535d 550d E90 E91 E92 E93 330d F01 F02 730d x5 - YouTube
has anyone done a MPPK airbox mod to N20 lower box? - BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST
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