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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Good Product for the $$$
Does the same thing the more expensive systems do for much less money. Definitely quieted and smoothed my truck a bit.
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Smoother idle
Heard a lot about this frx. All I got to say is it works good. Put the middle spring in and changed to a terminator 180 thermostat, gained hand calculated 2 mpg! I'd have done it sooner if I had known! Only reason I documented mileage is because I fill at my home tank driving same route, same speed, same distance. Egt runs 625 range cruising, before it ran 660 range.
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Great product!
If you have any doubts about this product, put them aside. The install is a bit of a pain but not difficult just time consuming, otherwise I couldn't be happier, my truck has never ran this smoother or felt this good! Thanks Clay!
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Love it!
I purchased both the HPX and an FRx, I love the increase in throttle response, it's quieted down the idle, and I love the sound when you get on it!
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High Quality - Immediate Throttle Response
This is a great, high quality kit and I highly recommend it. I wanted to improve the OEM fuel system and I got that plus much improved throttle response. I know my injectors love it. I also wasn't sure where the fuel sleeve went but it's in the fuel line and after searching and finding the old one inside the line, I knew where to put the new one.
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Professional kit, easy installation
The whole FRX kit was professionally assembled and ready to install. I had my 15 year old son install the kit while I looked over his shoulder and he is not a mechanic. Job well done! My truck runs quieter and I can tell it has a better throttle response.
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Lives up to the hype!
Put mine on and the only trouble I had was getting the regulator block lined up, other then that pulling the plugs and running the lines to less then 5 min per side. Made the truck pretty quiet as soon as I fired it up and no leaks anywhere.
You need to sell the spring packs separately I lost my black spring in the engine valley :/ other then that great product! -
Good Ingenuity and Quality
After reading the description of the product and researching others opinions, I decided to buy the FRX. I was hoping to have a noticeable difference with the cold starts and throttle response. The FRX delivered on both accounts. I am very pleased with the product, quality, and craftsmanship.
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Really can tell a difference!
Very high quality parts! Installation went really smooth and noticed instant improvement in startup and idle quality! Cold starts are easier (which is a big deal with 331,500), and overall performance is better. Highly recommend buying, along with anything from these guys!
