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      12-23-2012, 01:51 PM   #18
Drives: 335i
Join Date: Mar 2011
Location: My car is my home

Posts: 2,016
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Originally Posted by Hoody335
BTW my friends keep saying I should wait until I install my jb4 to install downpipes but I want to install downpipes first. Any harm done?
No harm.
Car will adjust air fuel ratios on its own. You WILL have a check engine light though.
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