Don't wanna be the black sheep in this thread but I guess I'll have to be. I'm on another website called e46fanatics.com and DDM Tuning is actually a sponsor over there. HONESTLY, they have THE WORST ratings and testomonials from members on that website. They never answer calls, don't reply to emails, and people have trouble with their warranty program. Instead making it seem like I'm bashing on these guys, I'm going to show you all a little screen shot from e46fanatics just to show you the search results when you type in "DDM".
DDM by King Ramses, on Flickr
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DDM by King Ramses, on Flickr