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      04-29-2023, 02:43 PM   #336
emthreepa
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Drives: G80 M3 Competition xDrive
Join Date: Dec 2022
Location: Pittsburgh, PA

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I have the DINAN exhaust valve controller and the difference is VERY SIGNIFICANT. I did not have it with the stock exhaust. I first had FI Exhaust Catback, then DINAN controller, which made a SIGNIFICANT difference, and then ARM Catted Downpipes added.
Appreciate 1
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