Good sound. I also have secondary cats removed on n54 pipes. Sounds like you have a bit of wastegate rattle there.
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Montego Blue E90 335i
7" VRSF IC | OFT Tune | DCI | RB PCV | Secondary CAT Delete & CYBA 3.75" Tips | M3 Front | Mtech Rear | CSL Trunk | 219M | KW V1 | AA CP
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