"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 will 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.
- FRx System
- 3 Springs for adjusting Fuel Pressure
- Viton O-ring
- Parker® Fuel Sleeve
- 2 mounting bolts
- Exceeds SAE 100R14A
- Rated for commercially produced B100
- Temperature Rated -100˚F to +450˚F
- Max. Working Pressure 3000 psi
- Minimum Burst Pressure 12000 psi
Fuel pressure spring settings
55-60 psi silver spring
61-65 psi gold spring
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.
Showing reviews 1-10 of 179 | Next
Posted by Bob on Mar 15th 2017
Awesome product and easy to install. Easier with 2 people to install on the fuel bowl but I did it myself. I like the piece of mind knowing air is not going threw my $1600.00 dollar injectors.
Posted by Art P. on Mar 4th 2017
Follow the instructions and watch the video and you will have no problem with the install. Save time and grief and buy the plug socket. My install was really easy since I was already into other repairs and had the fan, turbo, and pedestal off. Get the HPx also while you're doing this.
Posted by Unknown on Feb 27th 2017
Not a bad install, just takes a little time. So glad I installed it, much faster starting as well.
Posted by Mattyhawk on Feb 27th 2017
I installed mine with the turbo out doing up pipes and turbo rebuild. I believe in the concept of the FRx, and the evidence on this mod is good, but I did not hear any difference in the sound level of my truck that many mention. Truck runs fine though and glad I did it. No leaks from the first start. Mine looks a bit different than the picture. Hope it holds up over time.
I wrapped my up pipes and I wrapped the fitting in the rear driver side bank to try and protect it from being so close to the exhaust. Not too much trouble with either freeze plug. My biggest headache was getting enough clearance on the fuel bowl to regulator block with the fuel hard lines there, even with the bowl loosened. I also had to take a huge amount of time to get the plunger seated right as many have warned about. I ended up using an inspection camera from HF to make sure it was seated.
Posted by Unknown on Feb 21st 2017
Quieted the ol girl right down. Better throttle response!!!
Posted by Ray Schork on Feb 12th 2017
I installed the FRx the same time I resealed my plenums and added the billet plenum inserts while I was at it. I did remove the fuel bowl completely it gave me more room on the front passenger side fitting. Do order the small square socket you will need it. The kit comes with a tube of liquid thread seal so you are good to go. FYI the silver spring is for stock setup like mine. For my test drive I seemed to have better acceleration. But I did just install a new turbosmart wastegate with my turbo rebuild (new up pipes, boots, banks power elbo, EVPB delete pedestal) and that really made a difference. I have some other installs like the Riffraff banjo bolts and the CVD fittings. Maybe another day I'm wore out. This project took me about 8 hours (I like to take my time) no lie it is a lot of work but I also resealed my plenum and messed around with improving my wiring system. Seems like when I do one project I see a dozen other things that I need to take care of. Oy Vey!
Posted by Nick on Feb 7th 2017
I was a bit skeptical at first, but it really works. My injectors seem smoother and quieter now, and it seems to start a little bit quicker too. Very high quality as well
Posted by George Reed on Feb 5th 2017
This product is very well made but the fitting on the drivers side rear is no piece of cake to install! I have a early 99 and the turbo housing has to be ground, with that said the cross over works very well. I know RiffRaff cannot make the installation any ezer! It is what it is! Being 78 YRO dont help!
Posted by J Ledoux on Jan 25th 2017
Very well made product,installation was a breeze.I removed Ac comp and bracket and that helped a lot .Truck idles a little faster not smoother and no more cackle,not much of a gain in fuel mileage
Posted by Waco on Jan 23rd 2017
I ordered this FRx and decided to add the HPx to the order too. I was hoping to add things to our engine that would allow it to last longer. It currently has 135,000mi. After lots of reading, I purchased the pair. I noticed right away, the sound change of the motor. When cruising at 80mph or even 75mph, it's quieter in the cab. My wife asked what I did, because it was a smoother ride and quieter. I felt it in the steering wheel and seat. It seems to run now like it should have always been from the factory. Well worth the money. Plan on buying another setup for our farm truck and add the CVD fuel fittings to the order.
Showing reviews 1-10 of 179 | Next