Not entirely what you're looking for - but I had the full EVO system on my E90 M3, and it was amazing. Build quality, sound, everything.
It passed the actual emissions test (output numbers) though failed the visual inspection, which is done at the very end. If I had to do it all over I'd be sure to gently coast by as many roadside test stations as possible within a month or two of my renewal - this would avoid having to visit the actual testing station which is the only place they do the visual inspection.
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Current: G82 M4 Comp xDrive // Frozen Deep Grey
Current: 95B.1 Macan Turbo // Dark Blue Metallic
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