I bought a stock 2011 x5 5.0, no m perf package, exhaust sounds improved notably after dinan software stage2 was installed.
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2014 Porsche Cayenne Turbo S
2011 X5 5.0 Dinan - SOLD
2007 Imola Red Z4 M Coupe -SOLD
2004 Navy Blue BMW 325Ci
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