Thread: Insalling JB4
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      05-24-2011, 01:45 PM   #16
RedM1
Dirty South 1 Owner!!
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Drives: 09 135i
Join Date: May 2011
Location: Miami

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Quote:
Originally Posted by RnmEvo9 View Post
Yeah, I actually found taking off the cowl and airbox more annoying.

The jb4 didn't affect my mpg, then again I was averaging 16-17mpg stock in the city to begin with.

Coming from a 13-15mpg E85 powered Evo, I don't mind though.
Sounds about right my subie would get 16.5 on fuel eco map..
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