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Discussion Starter · #1 ·
Can anyone tell me if I would still benefit from having using and HPx line in conjunction with the CNC Fab 4 line fuel bowl retain kit? I would also plan on installing a pre pump hutch mod kit. Trying to save cash and add driveability to my truck. Thanks for any feedback. I'm still learning my truck.
 

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They both help in different areas.

Hpx helps stabilize oil pressure.

Cncfab fuel line kit helps equalize fuel pressure to the injectors
 

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So what is difference between Fab 4 fuel line retain kit and the frx from riff raff do there both perform the same function don't understand what difference between the 2 is
 

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Discussion Starter · #5 ·
Does anyone know if the HPx will clear the plumbing of the CNC four line kit with now problems. I've see a couple of different designs of HPx. Anyone have any experience installing both the CNC and the HPx?
 

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Email Corey at cncfab.

He makes and sells both items.

The frx is a bandaid. The 4 line feed kit improved flow and allows Air somewhere to go besides the injectors. Plus it flows enough fuel for 600hp.
 

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For clarification, how does the four line feed set up give air somewhere to go besides the injectors? That set up splits the out going lines and puts them into the previously deadhead rail on the heads, correct? That's how it looks on the site.
 

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Not meaning to highjack this thread but was originally planning on doing the frx mod along with the hutch mod while putting in a new fuel pressure sensor also maybe putting in the helper fuel pressure pump described on guzzles site. But after reading about the CNC 4 line return kit I am wondering if I should be getting this I have stage 1 injectors and have a ww2 wheel may eventually upgrade more so should I spend the extra $75 for the 4 line kit thanks for any suggestions
 

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Discussion Starter · #9 ·
Does anyone know if the HPx will clear the plumbing of the CNC four line kit with now problems. I've see a couple of different designs of HPx. Anyone have any experience installing both the CNC and the HPx?
Anyone?
 

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Yes, I think pretty much all the HPx kits will clear the 4 line kit. The 4 line kit sits pretty low in the valley. Here is mine - cant remember the brand of HPx, but if I can find it, I'll update the post.
 

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Yes, I think pretty much all the HPx kits will clear the 4 line kit. The 4 line kit sits pretty low in the valley. Here is mine - cant remember the brand of HPx, but if I can find it, I'll update the post.
Forgot to attach pic.
 

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The HPx kit in my pic above is a KCM. I bought it directly from KCM Diesel Performance, see link below:
Ford
 
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