Originally Posted by Esmanolo
I need some help on selecting a filter.
I have read that the AFE works well but I was told that it loses power and that the BMC is a better choice.
I would second the choice of a BMC replacement filter.
Its an awesome product and brand because their R&D has done significant homework on getting the air-flow to be free flowing. I have a BMC CDA Box on my JCW MCS, fitted several BMC filters/CDA boxes to vehicles from Audi R8 to VW R32 and Mercs to find consistent gains and high sung praises.
Although i won't be using an drop in filter on my M this time round, I would still recommend you to give BMC a good shot.