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Originally Posted by Diplomatic
Not currently but I've run the BMS stage 1 with the BMS Catless downpipe in the past. What were you trying to figure out?
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Originally Posted by scott135i
Is anyone in the USA running the BMS stage 1 tune with a catted/catless downpipe?
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BMS doesn't make a downpipe for the 550i. AR design does, active autowerks too I believe.
Trying to get some first hand impression on the stage 1 tune from BMS plus a catted or Catless downpipe. Obviously it makes more power but I'm interested in the subjective impression and would ideally love to drive one :-)