48" braided stainless steel line

[NCState98]

4 foot line, -4an straight fittings on each end. I thought this would be long enough for my fuel pressure gauge setup, but I decided to purchase a 6 foot instead.

$20

[PiercedJD]

off topic for sure, but you should definitely not be planning to plumb fuel into the cockpit in order to install a mechanical fuel pressure gauge. Get an electronic fuel pressure gauge if you want to install the gauge in the interior of the car. That is a huge no no unless it's a totally stripped race car and you have a fire extinguisher mounted in the car, or a mounted extinguisher system.

[NCState98]

I'm using a fuel pressure isolator under the hood, so it'll only be an antifreeze mixture in the interior.