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VRSF downpipe without CEL light coming on
I currently have a b58 440i coupe MT with full akra exhaust, BMS intake, and DINAN tronic sport tuner. I am planning on installing a VRSF catless downpipe but i want to know if anyone has done it without the CEL light coming on. I know the JB4 can clear this but i want to avoid that if at all possible. Any ideas?
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