Great kit to replace the stock metal lines. Mine were leaking so I went with these upgraded lines. Fit perfect, and look very nice as well. Glad to be leak free.

I was able to install this easily, and it fit like factory.

Riffraff really stepped their game up with professional packaging, I am very impressed! Truck starts faster and runs smoother with these lines installed, and check valves removed. I installed the long one on the passenger side and the short one up and over the fuel bowl, i couldnt make the short line work on the passenger side, other than that, great kit!

As many of the other reviews have said the quality is top notch. A few tips for installation:
To remove passenger head fitting you do not need to remove turbo spider, just remove passenger intercooler pipe, remove the engine lift bracket and you will have plenty of room. Next take a pair of heavy duty cable cutters and cut the old fuel line as close to the fitting as possible, then you can use a 15mm deep well socket ( mine was a 12 point) to slide over the compression fitting AND check valve at the same time and remove the whole assembly at one time. Install new fitting by hand and tighten with appropriate socket, next use 1/4 drive ratchet , 1/4 to 3/8 adapter to a crows foot ( 9/16? Can't remember) to tighten the fuel line to head fitting. The driver head fitting it's best to loosen/ remove the alternator/ power steering pump bracket to gain access. It's only 4 bolts, I was able to just loosen the bracket but depending on what tools you have to get to the head fitting you might need to remove the bracket.

High quality product, great fit, would buy the product again. Thanks for producing great parts for the 7.3.

My original factory steel lines were leaking at the fittings. Rather than replace the o-rings i opted to upgrade to this kit. Much higher flow no o-rings to fail the kit was fairly simple to install. Took me a good couple hours but was worth it. No more leaks.

These are a must have. You really have no idea what you are missing. I coupled these with the FRX and what a difference. The truck accelerates much smoother, throttle response is much improved and it’s even Quieter at cruise speeds. I would HIGHLY recommend this

A little tricky to install but we'll worth the time and effort!! Keep up the good work Riff Raff!!!

Installation was straightforward, kit was complete with everything needed. Lines were plenty long enough. I took the turbo off for better access. Engine runs smoother and seems to have a little more power.