The heater pipes come with the O rings installed already, I've installed over 15
of them on members cars with no issues, not a debate here just do what works for you,
even with the flat gasket that come with it, can't see them leaking from 2 metal surfaces mating, but just my 2 cents
do what you think is good for you, if it was a bad it would fail in 3 months, with each heat cycle

 

Yes - I misunderstood your post. It's good to read that you haven't seen any leaks yet.
Your post really helps with how the ones that came with the pipes perform - helpful feedback for future buyers to take into consideration.
Eventually, hopefully after many years & miles, leaks will crop up with the OEM seals or aftermarket. As long as they last a good long while they've served their purpose.

 

It is totally doable without removing the supercharger. Not the easiest job, but very much doable DIY style.