You will need to use crush washers. I believe the original ones are aluminum, but copper will work too. Don't use fiber washers on fuel fittings. I think the pressure line is 12mm and the return is 10mm
I now see that you are talking about a V6. I'm not sue of the sizes on those. but the one on the fuel damper where the pressure line attaches is a special washer.
I now see that you are talking about a V6. I'm not sue of the sizes on those. but the one on the fuel damper where the pressure line attaches is a special washer.