Dinan changes its sound after 4k and after 6k.
Dinan muffler vs Dinan full set up is like: 2 ch sound system vs. 5.1 surround sound.
Lovin my Dinan full set up sound for sure.
Both exhausts (akra and Dinan) have pretty good interior sound (noise level). Great for pleasure tones with daily drivability. But Dinan is a bit louder (inside and outside).
PAST: 14 F10 M5 | 11 E70 X5M | 08 E90 M3 | 08 E92 335i | 03.5 E46 M3 | 99 E36 M3