Turbo donors have the fuel filter in the pump. You will use your original line to hook from the pump to the fuel rail.
Sorry, when I saw yours had a turbo I did not realize it was a turbo swap.
I believe that elbow would be for the valve cover vent tube. The z57 turbo has one as well
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Unless kits have changed since I did mine, this line was fabricated with parts from the kit- nylon tubing and barbed quick disconnects on both ends. On the fuel filter side there's a double ended male steel quick disconnect barb which goes into the fuel filter and into the black plastic quick disconnect. Getting the quick disconnect barb into the nylon line is a chore of its own.So the 2 lines to the fuel filter, with 1 more line to the fuel rail is correct?
If so, I just need to know what I connect between the fuel filter and fuel rail. It's the only thing keeping me from trying my first start.
Unless kits have changed since I did mine, this line was fabricated with parts from the kit- nylon tubing and barbed quick disconnects on both ends. On the fuel filter side there's a double ended male steel quick disconnect barb which goes into the fuel filter and into the black plastic quick disconnect. Getting the quick disconnect barb into the nylon line is a chore of its own.
You can see the LSJ regulator in the fuel pump in my post here. Like Rauq said, the fuel bleeds back through the filter into the regulator to maintain the fuel pressure ceiling in the system. When you do the BRFPS, you use a single inlet/outlet filter and the return line goes to the external FPR. The internal regulator has to be removed like my photos show so that it doesn't mess with the fuel pressure in the line.