I am doing a stand alone fuel cell with a FAST fpr. It has a 6an on supply side going to fuel rail. I was wanting to come out of that with a 6an 90 to turn hose in correct direction. Can I come out of that 6an into an inline fuel filter (6an on both sides of filter) and then go down to a 4an fitting and line on the other side which is what the kit comes with? Will this cause a pressure issue. It will be set up on efi pressure.