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      12-08-2012, 02:23 AM   #5
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Drives: Alpine White '13 550i
Join Date: Nov 2011
Location: Tarzana, CA

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2013 BMW 550i  [0.00]
Originally Posted by Johnny D View Post
I get better gas mileage.
I have zero done with my exhaust. (You've seen the video, you cant hear it unless you're foot is in it)
There is no noticeable loss of power or torque down low. There is a gain in mid to high RPM.
I'll be doing a dyno soon.
Finally, I don't think you'll find any MMW headers left. He had one set left and if they are gone he probably wont be making any more. Would be best to check his facebook page.
I really hope he will make more, been planning this for months. They're the only headers that fit without trimming anything out right?
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