I am 4000 miles in with the Dinan exhaust and the droning has decreased slightly but still noticeable. I am also interested in how long it took before it goes away.
15 MB E63S AMG
14 BMW M6 Vert - Alpine White & Full Sakhir Orange. Comp Pack, Executive Pack, Driver Assistance Plus, B&O & 343M Wheels.
14 MB GL550
14 Porsche Boxster S (Gone)
12 BMW 550i xDrive - Dinan Stage 5 (Gone)
13 Infiniti JX35 AWD (Gone)
07 BMW 550i (Gone)
09 Hyundai Genesis 4.6 (Gone)