martyn Posted April 3, 2022 Report Share Posted April 3, 2022 21 minutes ago, CMA said: I think they might mean GPF rather than OPF which is: Gasoline particulate filters (GPF) are used to remove particulate matter from the exhaust gas from a gasoline direct injection (GDI) engine Ah, many thanks! Quote Link to comment Share on other sites More sharing options...
Raffe Posted April 4, 2022 Report Share Posted April 4, 2022 Apologies, OPF acronym is the German term (otto partikelfilter) also known as PPF or GPF in the US. Basically it’s muted all modern cars and they are software tuned so can’t just be removed without addressing the ECU. 1 Quote Link to comment Share on other sites More sharing options...
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