I can't imagine that it would have much more gains over stock with BMC. It's the same as Dinan, AFE, and GruppeM. Replaces stock air boxes and adds a cone filter.
MSR as of today has the best gains out if all the intakes.
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*** SOLD *** 2013 BMW M5 | Space Grey | MSR Stage 3 Tune | Catless Downpipes | MSR Intake and Charge Pipes | MSR Exhaust (Prototype) | Vorsteiner Rear Diffuser | RW Carbon Front Lip | RW Carbon Trunk Spoiler| Vorsteiner VS-310 Forged Wheels | Escort 9500CI w/Laser Jammers
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