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      10-25-2019, 07:29 AM   #21
M 4 FUN
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Drives: BMW 320, BMW M4 competiti
Join Date: Aug 2016
Location: Sweden

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Quote:
Originally Posted by CanAutM3 View Post
From what I’ve read and seen, there’s almost no difference between stock filters without the charcoal and a “performance” filter without the charcoal.

Atleast on his Subaru. Every car is differently designed so a comparison must be made on aF8X car to be able to see the true effect.
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