The 570 is MAF less, but I'm not sure if it's running a set map at WOT (open loop). I'll have to do some research and see if this specific ECU runs in open loop ever. If VF can't fix the issue with tuning, then I'll definitely have to do pressure tests to make sure everything is up to par.
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CURRENT ll F10 M5 l E85 Z4MR l I01 i3 REX
SOLD ll E70 X5M l E85 Z4MR VF570 l E36/7 Z3MR l E36 328i
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