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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A MUST HAVE!!!
This thing is great!!! Unfortunetly it took me a VERY LONG time to get installed. My rear plug was so tight everything I tried to use kept trying to strip it. The socket wasbuseless on both sides for me, 2001 F350. I finaly got the plug off using a Craftsman universal socket and a very small 3/8 drive ratchet.
As far as this product goes its AWESOME!!! I had done the oil crossover years ago so between the 2 it runs better than it has ever run.
All cackle is gone and it just sits there and purrrrrs. After seeing the difference I would do this and the oil crossover before anything else. Including gauges or AIH delete or anything else.
I really cant say enough about this product. -
What a difference
Installed this and the HPX at the same time what a difference. Truck runs much quiter and smoother now. Easy to install.
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Very noticable noise reduction!
First off, I took my truck to a local diesel shop to get the install done for both the FRx and HPx kits. Was charged 4 hours labor total.
Took dB noise readings before and after the install. The outside reading by the driver-side tire were both about 95-96dB, but the higher-frequency cackle sound was definitely reduced. Haven't got my wife out to listen to it yet, but I was able to pull into the driveway and not attract the attention of the wife or the dog.
Inside was where the noise reduction was more noticeable as it went from about 67dB to 63dB on top of the steering column when cold. Haven't taken a dB reading yet after it was good and warmed up, but on a recent trip, was able to have a conversation with someone in the back seat of the crewcab without having to raise our voices.
Let's just say I was very pleased about how much quieter the ride was. Just wish that I had read about these 2 kits years ago. Even paying for installation still makes this, in my opinion, the best mod ever for a 7.3L diesel. -
Works great
First it's not an easy in tall but not extremly difficult. It does not make your truck quiet like a gasser but it does eliminate the kackle . Great product verry well built
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Works great
This my second 7.3 diesel worked great on my first should be good on this one , ball bearing turbo next
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Great Mod
Easy install with proper tools. Installed this along with RIFF RAFFS HPO XOVER,BANJO BOLTS and CVD fittings. Also their intake boots. Noticed a 2mpg increase and truck not as clattery as before.
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Best Investment
Very noticeable difference in idle. Very clean acceleration through all the gears. Best thing I've done yet that I noticed on the first minute of idling. This is something I will greatly recommend to every 7.3 that comes to my shop.
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More MPG, Quieter Engine
One of the best parts I have put on the truck to date. After reading the reviews I was afraid this install would take all day, but I was done in about 2 hours. Just make sure to get the socket and it is an easy job.
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PITA
Don't let anyone fool you this is NOT a simple install. It's not the worst I've ever done but I wish I had known exactly what I was getting into. The plug on the passenger side head has no room to work. I found the easiest way was to remover the HPOP. Not a huge deal just one seal and an oily mess to clean up.
