Wallet pain but no gain. For stock & light mods BMW's are pretty well engineered right out of the factory. Personally I would have to wonder what if anything they can add when the intakes are in a high pressure area to start with.
2013 BMW 135is 6MT conv JB4/ISO
2011 BMW 335is DCT Coupe JB4/ISO/BMS Flash
2009 Ford Expedition 4X4 EL - 2009 V-Star
2003 Nissan Xterra 4X4 - 1998 Ford Ranger 4X4 Splash
FF Cobra Mk-IV work in progress