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.
416 Reviews Hide Reviews Show Reviews
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Wow! Thats is all
What a great product. Does exactly what the say and more. 2.7 mpg gain! Wish I han't waited so long to buy this.
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Awesome upgrade!
Did this upgrade with the cvd fittings and the oil cross over. Made my truck run 10x better. This is a must if you got yourself a 7.3.
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Well made, as usual
Decided to add the FRx to see if it might quiet my 2000 F350 down a bit. It seems a little quieter, and I like the idea of having an escape rout for the air in the fuel to prolong injector life.
Passenger side fitting a real PITA. Good test of my patience and perseverance. -
FRX Worth the $
Only difficult part of install was the passenger fuel rail plug. A universal and 8 point did the trick though. Made the engine a little less noisy and idle smoother. Did the banjo bolts and CVD while I was in there and picked up 2 MPG when I keep my foot out of it.
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This one was a pit of a PITA to install
Took better part of 2 hours to get that darn passenger fitting into the head. Finally discovered that the fitting threads in the head aren't aligned with the other bolts nearby. Also needed to move the A/C compressor over a bit to get some more access. Once I got the fitting alignment thing figured out it was pretty straight forward. By comparison, the driver side fitting was easy to install. This mod, combined with the HPx, did seem to smooth out my idle some. I still need to do the Hutch mod, so it isn't perfect yet.
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It is worth it
I did e fuel conversion on my old 97 I used to own. It was a pain in the rear. I was worried when I bought this for my 02 Ex that it was going to be tough as that old truck was. This was so easy and helps the truck a lot. It is such an easy install and does the job well. Riffraff is top notch quality products and shipping. Only thing I don't like is I liked getting the Riffraff decal stickers and I haven't got those in the past few orders. The little badge stickers are okay but those other ones are great. I keep one on my 02 Ex. I like supporting companies that have great products like Riffraff.
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Definitely helps with air in fuel
Love this product! Before install had alot of cackle from my 250cc hybrids. After install noticed a smoother idle and top end!
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Excellent product
It took me a little longer than others to install but that was my fault. The product overall is well made albeit the instructions don't say much on where to route the lines to avoid chaffing as much as possible. Also the driver side is fairly long, so long that I routed it up and over my intake and turbo rather than under because I couldn't get the line on that way. If you've never heard a rough idle diesel be prepared, the HPx didn't give me any issues but the FRx will make you think the truck is gonna die. If you have a method of putting your truck in a high idle after start I recommend it, doing that cleared out most of my air quickly. After putting nearly a hundred miles on the truck I'm not sure it's any quieter but my idle is much smoother and I no longer have a dead head system.
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Great product
It really helped my truck idle a lot smoother. Installation was fairly easy i would highly recommend buying the square socket I rounded one of the plugs and had to use vicegrips
