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GT3 Tim, did you install just the short pipe that connects the filter box to the airbox, or the whole intake system? Did you install a new filter as well, or was everything else the same? I have a hard time understanding why BMW would leave such performance on the table that could come at the minor cost of using a larger diameter plastic pipe. Yes, there could be noise reduction considerations, etc, but we are just talking about the pipe and not the entire intake system. Is the difference across the rev range? I guess it is possible that there might be low vs high rpm intake tuning considerations. I understand what you mean by the possibility of this mod somehow working with any modifications you might have made on the exhaust side, but it producing a very noticable difference even in that regard sounds surprising to me. What are your exhaust mods by the way? Anyway, not being critical, but just being somewhat skeptical...
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