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Discussion Starter · #1 ·
Does anyone have a 435i specific tune yet? I have to admit that I have been out of the BMW tuning scene for a while, so I am not up to date on these motors.

I imagine that the best 335i ECU tunes are going to be the best choice for the 435i. So which tunes are the 335i guys using?
 

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its the same engine different mapping as far as i know, might be careful trying to use a 335 tune with 435. I'd call around to the reputable tuners and see what they know...
Might not be worth the risk to use 335 mapping on a 435, although there might be some similarities in the engines from what we can see and read, there's probably much more going on that we don't know about. Best to play it safe.
 
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