Hey guys,
Just replaced my stock air filter with a Macht Schnell. Would you guys recommend putting the intake cover back on or just keeping it off?
I think I remember reading that people posted the highest gains leaving it off.
Thanks
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PAST 2007 Black Sapphire E90 335i, 2010 Jerez Black E92 M3, 2012 Mineral White E92 M3, 2013 Singapore Grey F10 M5, 2016 Azurite Black F80 M3,
CURRENT 2017 Oxford White GT350