This kit automatically includes 2 fuel rail check valve delete fittings. We deem them necessary and do not sell the kit without them. This is the reason for the difference in price compared to the standard FRx kit.
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.
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
- 2 Fuel Rail check valve delete fittings
- Exceeds SAE 100R14A
- 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.
*A note from DP-Tuner: All Fuel systems upgrades are DROP SHIPPED from our supplier's warehouse. 7-10 day delivery delay should be expected due to this being a specialty item. If you are needing this sooner please call us to check on their "in-stock" status. A tracking number will be forwarded to you by email as soon as we receive it. *Overnight shipping not available on these items.
- This system is recommend for stock to stage 1 injectors. Anything larger and we recommend using a full regulated return system such as the one we offer by Driven Diesel.