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· OG Fanatic
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479 Posts
Discussion Starter · #1 ·
I have a 330Ci, with an Eisenmann exhaust installed, since then, my gas mileage has dropped from roughly 24MPG down to like 21-20MPG, anyone have similar experiences?
 

· []D[][]V[][]D[][]\[]
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4,977 Posts
same here with gruppem and remus
 

· OG Fanatic
Joined
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479 Posts
Discussion Starter · #7 ·
I drive it about the same, I've tried to drive less aggressive but still have the same result. I thought it maybe something wrong, but it looks like everyone has the same result. Also, those who drive 330's that rubber tube that used to go into the stock exhaust to control the flap, did you put something up into the tube to stop the airflow? My mechanic put a screw up to seal it. I wonder what that was for.
 
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