Just picked up my M5 after the 1200 mile service and the Akra exhaust was also installed. I had Dinan on my e60 M5 and M6. I also had Dinan on my e39 M5. I think Akra is heads a shoulders better than Dinan. I also had Eiseman for a week on a previous car. The Akra exhaust has a quality and performance sound that is far better than any other. I love it.
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