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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One of the best upgrades
This is one of the best upgrades I've added to my baby. She idles smoother and alot more quiet than before
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Improved Driving
I did not notice any quitter idle with my MODS but it does drive smother & has a little less noise while driving. This is insurance to me so I don't have to replace injectors again at 170K.
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needed
something that belongs on 7.3 powerstroke,thanks very happy with it
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Great for a regulated return while keeping fuel bowl
Great product!
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Worth the struggle
I'll start by saying that this upgrade is indeed worth the time and effort, hence the 5 star rating. With that being said, a little advise to future purchasers. Get the 9/32 square socket. Just do it. You'll understand why when installing. Second, I'm glad I was doing an HPOP overhaul as this would have been a pain to install otherwise. Do-able, but a pain. On my set up there is a noticeable difference in cackle (I also installed the high flow banjo bolts). Much quieter, my neighbors thank you. Overall, clean looking install, great results. Great product. Highly recommend to any 7.3L owner
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Would recommend to all 7.3 owners
Glad I purchased this, took me almost 3 hours to install, but now that I've done the install. It'll be easier, bolt in the drivers side was a pain to remove but product works great.
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Excellent quality
It's hard to say what improved my idle more, the 3 injectors I had to replace (injector cup job) the HPx, or the FRx with higher fuel pressure.
Either way, riff raff's products are second to none. Installation was simple and straight forward. Great reliability mod for the 7.3! -
Improved idle
Excellent product, made a huge improvement in the way it idles and runs, very easy to install products comes with install direction fast and easy.
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Why would this not be a stock item
Not hard to install. If you do not have a regulated fuel return, not many do, than this is a great way to equalize. Great idea and a great product.
