Sounds like one of the CAT's are starting to rattle. Do you hear that sound when going WOT? Keep an eye out, or go see the dealership, they will replace under the emission warranty.
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-Diplomacy is saying, "nice doggie while trying to find a rock"-
07-Z4 coupe-Black/Black/6MT/sport/premium/X
04-M3 vert-Black/Imolla/6MT/Cold/Xenon/HK/
06-M3 Coupe-Mystic/Black/6MT/ZCP/Xenon/HK/
09-135i- AW/Bk-Lette/6MT/M-pac/Nav/Hi-Fi/Usb-Ipod/SOLD
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