Thread: AR downpipes 535i
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      01-16-2013, 11:41 PM   #11
LACSTER
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Drives: Hybrid
Join Date: Nov 2007
Location: oc

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Originally Posted by MophoMan View Post
so will a tune be necessary for the downpipe? If so, which is recommended?
Tune is not required but recommend and the JB4 Stage 2 tune will get rid of the CEL.
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