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Forget turbo noise . . . your wife may not be a fan of the catless smell either. Are you keeping the cats in the midpipe?
For performance and retained cats, consider high flow catted downpipes and catless midpipe (berk or MadDad, or a full exhaust system) to avoid the smell.
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1M track toy mods: BMS chargepipe, BMS OCC, ADE FMIC, ADE motor mounts, MadDad/Lightweight Ti exhaust, ADE custom oil thermostat/cooler, custom MHD tune, F10 550i clutch, Ohlins R+T, Vorschlag camber plates, M3 'vert FSB with Turner endlinks, Stoptech Trophy BBK.
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