I have the Eisenmann Race mated to the N55 and it sounds great. It has a nice metallic crescending sound as the engine climbs the rev range. In addition the fitment and quality is very good with a nice slash cut tailpipe design.
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Current mods: Forge FMIC, N55 Midpipe, Alcantara Steering Wheel, OEM 2012 LCI Black lines, BMW Performance grilles and pedals, Ohlins R&T suspension, Supersprint Exhaust, BMS Charge Pipe, Forge Diverter Valves
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