Heard someone talk about using DB Killers on the $250 eBay exhaust. I already have that exhaust, so I finally got around to doing it and it really works to eliminate the drone. A $17, 3 minute upgrade! Made a DIY video: https://youtu.be/V2hNlaO1oo4
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1998 Boxster
2015 BMW M4 Dinan Stage 3
2016 BMW S1000XR
2015 Ninja 300