O2 spacers - Rennlist - Porsche Discussion Forums

4.7 (415) · $ 21.00 · In stock

991 Turbo - O2 spacers - Does anyone here use O2 spacers in combination with bypass-pipes (without a tune)? If so, does it prevent the CEL from coming on? I have a FVD muffler that I would want to use with bypass pipes but I don
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