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New member to this forum. I picked up my black/black '08 535xi just 2 weeks ago. I was cross shopping a 550i and found the 535 much nicer/easier to live with as a daily driver. Now after reading through these and other forums I find out we can bump the hp north of 400 with a relatively simple tune. Who knew?!? Not sure I want to get too extreme with tuning, maybe just a dci system. I love my car!
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