You would likely need to order the parts from Kellener-Sport in Germany and then have someone knowledgeable to install the parts and software. I could ask the guys here for you if you like.
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I emailed Kelleners 2 months ago (after seeing Russ' vid) to see if there were any dealers in the US or Canada. Here is his reply.....(maybe we need an update?)
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hello
thank you for your inquiery.
unfortunately we do not have a dealer in the us or canada.
it is though possible to modify the car with a smaller package(increase of about 30 hp and 30 nm)through a software upgrade and installation of sport catalisers.
to modify the ecu it has to be send to us and then will be returned within a day.
the ecu can be taken out by any mechanic.the same counts for the installation of the cat system.
the installation of headers and or the camshafts takes a sophisticated BMW garage.but most of the dealers have no tools for the cams and could only install the headers.
the package mentioned above has a cost of 5230 euros.
please let us know if you have any more questions.
regards
ralf kelleners
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"Aerodynamics are for people who cannot build engines"...... Enzo Ferrari