I had a 2011 35i M-Sport and now have the 2013 35is so I am familiar with both, and I noticed a big difference in power and the sound of the exhaust is better on the 35is. For an every day car, the low end torque makes it a fantastic choice.
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Jim B/Glendale CA
2013 Z4 sDRIVE 35is Melbourne Red
2002 Ferrari Modena, 2006 Lotus Sport Elise
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