Why would you spend $3k+ on a slip-on exhaust that has 1) no power gain 2) barely any sound gain?
Sounds like the dumbest thing you can do... I mean beyond dumb...
Get the full system if anything, I've heard the full-Akra and it doesn't sound that much louder over stock. To the trained ear yes, but nothing insane like the Eisenmann and other race systems.
Wait for the OEM BMW silencer system that should be here in a month, I'm very interested to see/hear that system as well...
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'12 CLS550 Palladium Silver - loaded
'11 E92 M3 ZCP - SG/B-EXT/CF, M-DCT, loaded
'11 E93 328i, BSM over Saddle Brown, sport, loaded
'08 550i M-Sport, Carbon Black (Gone but not forgotten), '06 W211 E55 AMG (Gone, miss this animal),'01 E39 540i Sport