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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Great product
Installed on my truck 1 week ago. Truck runs a lot better, starts easier, eliminated dead head completely.
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You need this!
Its a great product, well built! It did quiet down my motor a bit which is nice..also replaced the cvd fittings, put in all new alliant injectors stock TS 6 position chip stock mods 2000 7.3 excursion. my Ex runs like a champ. Thank you Clay for all of your great prices and products.
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This really works!!!
Quieted down engine noise not only at idle, but at highway speeds as well. Acceleration is smoother and fuel mileage has increased about 1 mpg. Will pay for itself in fuel savings alone!
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Great Product, PIA Install
I installed at the same time I did a fuel filter bowl rebuild (o-rings also from RiffRaff). Easy to install to bowl while bowl's out of the truck. Plugs came out easily with the recommended socket. I unbolted and moved the bracket for the glow plug and AIH relays to give a bit more space. Nonetheless, both front and rear fittings were a bear to install. Each took probably 45 minutes to finally thread into the hole. I think the rear would be easier with a second person taking the tension out of the hose. With the front, you're just going to battle the lack of space with the HPOP. My rear hose definitely rubs the pipes. I wrapped it with heater hose and then wrapped the hh with electrical tape. Hopefully it won't rub too badly.
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Read This!!
I'll never put another chip in a 7.3 without this mod (which can be a PITA) or the Hpx mod. Save your injectors from air, and cure the cackle noise. Cheap, but absolutely 110% worth it. Riff Raff has my business for life.
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Great product
Well made, and fit like oem. It also quited down # 8 cylinder. Thanks for another great product
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outstanding
Great fit and and directions.
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Great kit
Installed return kit while doing some other work, well made, great price, and smoothed out my 7.3 like you wouldn't believe. My only regret is that I didn't do it 100000 miles ago.
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Less cackle, smoother idle
Couldn't be happier with this product, easy install, and a noticeable difference in the idle! A must have for any 7.3! Thanks Clay! Keep up the good work!
