Yeah, the BA F6 is my car, and Silojet is correct in all of that! stock intake (just the lower mouth airbox & standard intake, which was all stock for the F6). It is making around 16PSI of boost, so that's why its so loud, but the xforce exhaust makes it sound pretty good on boost with the 4inch dump and 3.5" single straight through. Mufflers are quite large, you'd think it wouldn't make that much noise! Was a great cruise though.