I'm using the Perrin v1 fuel rails that came with my donor on my 818. It's been awhile since donor tear down and I'm looking to confirm the correct routing of my lines before hooking everything up.
The large fuel hardline coming from the tank will go to fuel filter and then the FPR (topside of gold distribution block with downward curved hardline). The smaller tank hardline will connect directly to the return (brass hose barb). That about right?