7.3L Diesel Fuel Rail Crossover™ (FRx) 99-03 Powerstroke
"The Prescription For Your Fuel System Needs®"
Our 3rd Generation FRx™ System utilizes Eaton Aeroquip® 304 Stainless Steel Braided lines covered with a groundbreaking protective layer of HYTREL® from DuPont.
The FRx™ was made to solve the 'deadhead' fuel rail issue on the 99-03 Powerstroke engine by connecting the two heads and allowing a metered return you allow the air another return path, rather than forcing it through your injectors. This product was designed to eliminate the need to cut your return line and use compression fittings, so that it is a true bolt on system. We have also machined the FRx™ block to provide from stock to 72 psi of fuel pressure depending on which spring you choose to install it with. By using our kit and eliminating the air in the fuel system you can experience smoother, quieter idle, less cackle, and better throttle response among other things. You will also be increasing your injector life as well by utilizing the FRx™ and creating a regulated return back to the tank. Protective covers are also pre-installed to prevent chaffing of engine components from the SS braided line. These covers are also great if you want to keep the system looking OE and not draw attention to it once installed.
Included: Techical Info:
- FRx™ System - Exceeds SAE 100R14A
- 3 Springs for adjusting Fuel Pressure - Rated for commercially produced B100
- Viton O-ring - Temperature Rated -100˚F to +450˚F
- Parker® Fuel Sleeve - Max. Working Pressure 3000 psi
- 2 Stainless mounting bolts - Minimum Burst Pressure 12000 psi
- Custom 9/32" socket
Fuel pressure spring settings
55-60 psi silver spring
61-65 psi gold spring *Recommended
66-72 psi black spring
Riffraff Diesel Performance is committed to 100% Made in the USA. All materials are from USA resources. Every machining step is performed in the USA. Every component is assembled in the USA.
420 Reviews Hide Reviews Show Reviews
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FRX does what it claims to
The product quieted my 7.3, and I have better pedal response. One of the few products that does what it claims to do. Worth every penny I paid for it. Tight on the install but worth it.
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A perfect fit, "USA Made" product
Besides a larger exhaust, this is the first mod done to my '02. I decided to install this return system "while I was in there" performing a complete reseal of the oil and fuel systems. It went right in as it should, and the hoses were "clocked" correctly to land on the head fittings perfectly. The recommended middle spring was installed in the regulator. After install, I noticed one thing right away .... quicker starts, especially cold start. It also seems to have a smoother, idle to off idle manner.
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Excellent product
As usual riffraff came through. Well built product with nice heavy duty hoses. I installed while changing the injectors so I already had most parts out of the way but I would think it would have been an easy install anyway. Between the Hpx, Frx and new injectors from riffraff the truck has never ran better.
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GREAT ADDITION
I was very skeptical that this would do anything, but boy was I surprised it quieted my truck big time while I was driving. Extremely easy to install and very well made. Starts up faster and improved throttle response, I recommend this product for anyone with a 7.3!!!!
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Bought to replace leaky stock fpr, got more than bargained for
So I snapped the stock FPR fitting on the fuel bowl and wanted a nicer and permanent solution. Well after I had this installed, not only was the leak obviously stopped, I have picked up a very noticeable amount of throttle response, low end power, smoother running motor. And it looks awesome. Buying the Riff Raff Frx is a no brainer and I recommend to 7.3 super duty owner out there period!
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Installed HPx + FRx
Great quality parts - good directions - much less noise - that`s why i did it
HPx 1/2 hour install ( easy ) - FPx 6 hours (what a pain) be sure you can remove the plugs first.
Bought the 9/32 square socket - could not use - no clearance for ratchet or u-joint - used small vice grip and 9/32 ignition wrench (Note to Riffraff)
Maybe a 1/4 drive rather than 3/8 for the socket -
Install a fuelrail crossover
Nice pics straight forward install. parts fit like they should, can tell products are american made thanks
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Nice upgrade and straight forward installation
I just got the fuel rail crossover installed and it appears to accomplish what it was designed to do. I haven't run it long enough yet to determine the economical impact of the upgrade so I am hesitant to award it with 5 stars.
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excellent product
...great throttle response, truck runs smoother and does a great job getting fuel when I pull my RV -39' toy hauler
would recommend this to anyone
