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Thanks to this thread I got the MPPK a couple of months ago. Well worth the $1000, just makes the N55 so much more fun. Its strange BMW doesn't really market this at all, as I only found about it thanks to these boards. The dealership I bought from I dont think has ever sold it which was strange. Seems like fuel economy also improved, but maybe that was because the car was brand new before and now has 8K+ miles on it. BMW in Tenefly gave me a good price on it in case you are in NJ area.
Also just ordered the dinatronics sport tune for $299, will post a review after I get it. Was just about to order the Racechip ultimate based on this forum and the F30 forums, but for less then half the price I figured it would do 90% of what RCU does. It sounds like they all do the same thing by playing with the boost, and its sounds like it stacks with the MPPK. Also figured with Dinan, even with no warranty, they must have done some basic testing on the unit with this exact engine.
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