I have a 2020 Panamera 4S with the Porsche sport exhaust (in Canada). I was wondering if the car has an OPF because the startups are actually quite loud. I am under the assumption that only the new 992 tts and the 718 spyder/gt4 has OPFs. Is this correct? Can anyone confirm if the new penny 4s has OPF?

 

What is OPF?

the Sport exhaust is closed by vacuum, so when the car starts the exhaust is fully open, hence louder

 

Interesting. I find the sport exhaust in my Panamera Turbo S to be extremely quiet. I missed my old 970 Panamera GTS with that NA V8.

 

971 or 970?
Every now and then people talk about how quite the PSE is on a 970 Turbo/Turbo S, and I don't get it. It's certainly not as loud and noticeable as the NA GTS, but it's not quiet with the exhaust opened up.