Quote:
Originally Posted by ZheHbKa
this is for $379 JB stage 1, stage 2 for $579 will give way over 400 hp
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In your dreams, maybe. Their claims are overstated, and pushing that much more HP over stock means they're stressing the engine past its design parameters. On an N54? Sure, no doubt they produce that kind of power, but highly doubtful they're getting "way over 400 hp" on a 2013/2014 N55, which is designed and tuned for efficiency.
I went with the MPPK and MPE for the same reason most others have stated before - it's factory parts, they're a value-add at trade-in/private sale time, they're designed by BMW engineers, and there's no warranty issue. I also bought mine from getbmwparts, but I installed the engine cover and lower intake piece and the stickers myself. Dealer charged me less than $100 to install the software. I got the MPE and MP gloss black grilles as a package for about $1300, port-installed.