Yeah, I guess that was an option but since I didn't know for sure the resonator was the problem I wanted to spend as little as possible to diagnose the problem. This Supersprint is more expensive though...

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4.8is 2004 imola red
4.8is 2005 Black on Black - DINAN/2 sold
4.4 2004 X5
2003 330xi
2008 328xi - sold
4.4 2000 X5 - sold