there's lots of stuff here, carrera fuel line, (BAT and AN fittings)
but that sorta depends on the rails, damper, fpr, filter, and which lines you have comming up from the tank/pump.
quick answer is stock 3.2 rails, damper and fpr and filter top are m16x1.5 to dash whatever size hose you intend to use.
if your talking about a rising rate regulator I have done this
you can see the E sender at the right side