Thread: Burger Tuning F90 M5 JB4 Power gains of up to 80whp and 100wtq!!
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      06-25-2018, 06:54 PM   #5
onfireX5
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Drives: F90M5,F85X5M
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Originally Posted by koko f90 View Post
Wait a sec
While using jb4 the check engine lights will always be on?!
No. It used to delete the cel for cat deletes in the US. Not now.
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