Chris, sorry since Deano put a ? mark, I was awaiting confirmation.
The two oils pipes from the filter enter the block below the exhaust manifold on left bank (view from inside car), and I would say around cylinder no.2.
I cannot conceive how a leak from these O rings would appear to come from RMS area, so almost certainly you have a different problem. The leak, when I had it on my car, was clearly from the left bank area.
Cheers
