7.3L Diesel Fuel Rail Crossover™ (FRx) 99-03 Powerstroke
"The Prescription For Your Fuel System Needs®"
Our 2nd 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.
395 Reviews Hide Reviews Show Reviews
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Regulated Return
I already put one of these on my 1999 7.3, and just finished install on a new to me 2002 7.3. This is by far one of the best fuel system mods you can do. Ford was so short sighted to not produce the 7.3 with something like this already on it to help out your injectors. Install is straight forward, and Riffraff has made some changes as it was even easier than the system I put on about 8 years ago.
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I love it
I love it
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Bonus!
Tons of video help, just take your time and follow each step. As an added bonus, my kit came with the socket required to remove the square plug. Customer service is very responsive and shipping was as promised. Highly recommend!
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7.3 Fuel Rail Crossover
Installed the HPX, FRX, banjo bolts and SS fuel feed lines on my 2001 F250 with 7.3 a couple of weeks ago. Not sure on fuel mileage improvements yet, however, I do think it runs a bit smoother and quieted it down some. This is not my daily driver so haven't even put a full tank of fuel thru it so not alot of feed back at the time.
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FRX
This was by far the best add on I've done so far. Riff Raff will be my go to for future upgrades! Truck runs so much better. Also bought the SS braided fuel lines at the same time and everything worked out great! No more leaks and better responsiveness from the engine. Thank you guys again.
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Frx
It really is shocking how much better/quieter the truck runs with this mod. I should've done this 3 years ago when I got the truck. The install isnt that bad, just also install the CVDs, passenger side fuel line, and anything else in there to make it worthwhile and clear out the whole valley and give yourself plenty of room.
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Regulated Fuel Return
Hands down one of the best mods I have ever done on my Powerstroke. Easy install, and super clean once installed. Truck runs smoother and quieter than ever.
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FRX crossover
Nice product installation a breeze quality product Happy with purchase
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7.3 fuel rail cross over lines
Oh man! Great! Simple, no leaks and seems to run better, no issues at all!!
