The exhaust sounds awesome, I was thinking about this one myself but I couldn't find enough videos of it online so I went for an eisenmann...although, this would have saved me a lot of money!!!
2010 BMW e92 M3 M-DCT (Frozen Grey/Black) - Sold
2007 BMW e92 M3 6MT (Jerez Black/Palladium Silver) - Sold
2002 BMW e46 M3 SMG (Titanium Silver/Black) - Sold