HPX Mod - big difference

[stage3-7.3]

I recently bought Diesel Innovations high pressure oil rail crossover. I have a regulated fuel return kit, but I have not installed it yet. The HPX really made a significant improvement at idle and lower speeds - the engine is noticeably quieter. This is an easy mod and pretty cheap. I really believe it is a great return for the money.

[jesilvas]

I like it, but I would NOT run a rubber line anymore. Had one crimp crack and leak, and another completely blow apart. The only one I'd run is a hard line, and preferably Strictly Diesel's line.
Also, keep the HPOrail plugs you pulled out to install in case you have to pull the HPXover off.
Also, I'd get the orings that fit those plugs from Ford to keep with you if you ever need them. The old orings will dry out and leak or maybe not even seal at all if you put the old plugs back on. The new orings are kept in a sealed bag with an oil coating so they stay good.

[jesilvas]

Just looked at theirs. Wouldn't run it cause it's rubber. Maybe I had bad ones, but the one that had a crimp crack was done by a member here and he does them for a living. They just wear out. Just keep an eye on it.

[Zander's 5.8]

Just put my HPx hard line on today from riffraff, i also noticed a difference in noise and idle quality. Cheap and very easy mod, well worth the money.

[stage3-7.3]

Originally Posted by jesilvas

Just looked at theirs. Wouldn't run it cause it's rubber. Maybe I had bad ones, but the one that had a crimp crack was done by a member here and he does them for a living. They just wear out. Just keep an eye on it.

I'm bummed to hear that. I'm a huge fan of Riff Raff [who offers the solid line] but I went with DI because of the rubber hose and I figured ease of installation. The DI hose is hydraulic and marked 5000 psi. I'll keep an eye on it and I did save my original bolts.

[jesilvas]

Yea, just watch it. It may last you forever. The hose wasn't the problem on mine but the crimps on the ends. Maybe just my truck, who knows.

[hollister25073]

I had one from di and it started to leak around the crimped part but it was over a period of a few years

[Zander's 5.8]

The hard line goes in really easy too. Just slide it in from the passenger side, i didn't have to remove anything but the two plugs.

[stage3-7.3]

Originally Posted by Zander's 5.8

The hard line goes in really easy too. Just slide it in from the passenger side, i didn't have to remove anything but the two plugs.

When I was shopping, I went with the hose assuming it would be easier. But your right on, once I removed the intake I noticed that it really didn't matter for ease of installation.

[rufushusky]

Originally Posted by Zander's 5.8

Just put my HPx hard line on today from riffraff, i also noticed a difference in noise and idle quality. Cheap and very easy mod, well worth the money.

Originally Posted by Zander's 5.8

The hard line goes in really easy too. Just slide it in from the passenger side, i didn't have to remove anything but the two plugs.

^^^ agree. I was very surprised by how much smoother and quieter the engine is. I got the same HPX, very easy install. Even the factory plugs came out nice and easy.