X pipe on toady so resonator & stock mufflers gone, sports mufflers on rear (no idea what brand) - awesome sound........................
X pipe cost $250 installed at local exhaust shop.....

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X5 4.4i 2006 sports package, Titanium silver, Sports exhaust with Xpipe, Limo tint, 20" wheels 168's (Black), 25mm H&R wheel spacers& arch flares all round - Loud........

Work in progress -:
Replace BMW Ipod system with DICE - installed but no sound yet??