I did quad resonated with sport (with valve option). It is pretty sweet dude! If you're worried about drone, go with the valve option rather than HFC. When I close the valve I get zero drone on the highway.
11' E92 M3 Space Grey | DCT | ESS VT2- 625 | Gintani Race (valved) + Quad Res Catless X-Pipe | KW Sleeve's | GC Camber Plates|Arkym Diffuser | Vorsteiner VRS Lip | P3 Boost Guage | Stud Conversion
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