tr1105:
You've got some reading to do. Lot's of info on PPK (mild tune) and exhausts (sound) in this forum. Apples v Oranges.
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2007 E90 335i, TiAg, 6AT, ZPP, ZSP, ZCW, 6FL, HD
Quaife lsd, ETS fmic, GIAC s/w, Dinan intake/exhaust/oc, Koni/M3 susp, Apex Arc 8, Mich PSS
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