Hi fellas, what's the story regarding this type of inlet manifold, I'm often told it doesn't use a gasket, instead one must use an o-ring. Question is, does it really matter? What happens if I use a regular gasket on this manifold instead of an o-ring, will it cause any issues? I just checked on franzose.de and it looks like there was actually a factory inlet gasket for these cars, please advise https://www.franzose.de/en/Peugeot/504-604/Ein-und-Auslasskruemmer/ANR71269/
