I have a BS in Mechanical Engineering and was a member of SAE
As it stands today FI systems are just about off the shelf.
You figure out how many CC's you want to enter the cumbustion chaimber and figure out how much you want to spend.
But where ever BMW is getting them from...most likely BOSCH...they need to have their heads examined!
Modern FI systems unless abused should work for over 100k miles EASY!
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