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.
409 Reviews Hide Reviews Show Reviews
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preventive maintenance
Simple, straight forward install cost effective to give air another way out besides the injectors I have it on my 99.5 and 2000 my 99.5 has had it for about 3yrs no issues.
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Love it
Idle is much smoother and I am working up the current MPG which has definitely improved.
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Little bit quieter idle
Truck now idles a little smoother without as much of a knocking cracking sound coming from the engine.
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Well worth the money
I did this mod along with the FRx and it made a big difference in the running of my engine. It is much quieter and runs smoother. I would recommend this to anyone that has the 7.3 engine.
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does what it's supposed to do
I always had satisfactory fuel pressure, but always had a fuel knock too.
installed item and had the same pressure but alot quieter smooth running engine.
Now I was losing pressure under hard load,10psi. So I did the "hutch" mod and it's working great! -
FRx !
Awesome upgrade! A must have. Easy install, great quality.
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smooth
It was almost unveil able how much smoother my truck now idles and quieted the truck down a bit too. awesome product and easy install.
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'03 7.3
Along w/Full Force AD's, my truck never idled so smooth and quiet, feels peppier, next weekend pullin' the 5er will tell for sure. Easy install, quality all the way. Same performance as Reg. Return at a fraction of the cost. (I can't see the gauge while driving, anyway)
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great product
Great product as usual it really help calm the motor down. If you have a 7.3 this is a must thanks for another great product.
