My main concern with the Eisennman is that I have the catless AR DP so the elimination of the secondary cats in he Eisennman worries me in terms of loudness and sound. But talking to Tom @ EAS, it seems that the turbo cars are quieter overall than the M cars in terms of exhaust systems...so I'm still considering it...I should have gotten the Race Cat AR DPs.
2015 M4 (on order - ED in September 2014) Mineral Grey with SO
2013 Tesla Model S, 2011 Land Rover Autobiography, 2010 RR Phantom, 2012 S550
2010 AW E92 M3 (SOLD) 2009 Z4 Sdrive35i (SOLD)