This is the email I wrote them:
I am intrigued if this down pipe will fit the U.S. Version of 335d and By the way do you have any dyno runs to back it up, some of us are interested in this. Thank you
This was their response:
Unfortunately it doesn't fit... I have tried to get a US original part so we can make one for your market. The software is almost identical and one USA customer had his car on a rolling road after our software and getting a custom downpipe. He achieved 374hp/540ft lbs...
I have attached a dyno graph of a recent 535d in our workshop which had this modification.
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