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Ships within 48 hours · Estimated delivery Aug 29 - Sep 3
X4 M40dx & X4 M40ix
The factory airbox is very restrictive and the cheap plastic material perishes over time
with an OEM-style carbon fibre coat over the top
Available to order individually
fitment & durability
Pipercross Plus BMW M3/M4 Drop In Panel Air Filters (G80/G81/G82/G83) TAX_RFND X4 M40dx & X4 M40ixPipercross Plus air filters have improved strength and rigidity, swapping out the mesh used in the regular Pipercross panel filters and replacing it with a stronger and better looking 1mm steel frame. You can really feel the difference that this change makes to the strength of the filter, even when pulling 100s of CFM (cubic feet per minute) through the foam. The Pipercross Plus filter utilises two foams, the 20 PPI Foam and 60 PPI Foam. These
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