2017-2019 Ford 6.7L Powerstroke Fuel Rail Parts

Fuel Rails on the 2017-2019 Ford 6.7L Powerstroke

The 6.7L is a V8, and each bank gets its own rail. The Bosch CP4.2 feeds both rails at up to roughly 30,000 psi on 2011-2019 trucks, and the rails supply eight 19 mm piezo injectors that fire up to five times per cylinder per cycle. That pressure is also the platform's limit for big power: the stock injectors are quick-firing and support 700-plus rwhp when fed properly, but the CP4.2 cannot hold rail pressure at long injector durations. The rail parts in this collection cover both jobs, replacing contaminated or damaged factory pieces and adapting the rails for added fuel supply.

What fails and why

The main rail-side trouble on this platform starts at the pump. On low-lubricity ULSD the CP4.2's internal cam follower can lose contact with the cam lobe and wear, and the metal it sheds goes into the rails, injectors and lines. P0087 and P0088 rail-pressure codes are the classic warning, often alongside hard or long cranking, rough idle or surging, power loss, knocking from the front of the engine and glitter in the fuel filters. Once metal has been through the system, the high-pressure lines are replaced along with the rails and injectors. Before you condemn anything, rule out the simple causes: a warm hard-start most often traces to a fuel leak that loses prime, or to poor fuel.

Stock replacement vs. upgrade

For a repair, new stock-replacement rails are the straightforward choice. Exergy and XDP both sell new left and right rails, and the leak rail and electronic pressure regulator are available on their own when only one piece needs attention. If the CP4.2 has contaminated the system, a fuel contamination kit from Alliant Power or XDP, with or without the pump, is built for the bigger repair. The upgrade side is fittings. Because the CP4.2 cannot hold rail pressure at long injector durations, high-power builds add a second pump, and Exergy's rail plugs, rail end adapters, T fittings and supply fittings are the hardware for that kind of plumbing.

What we carry

Exergy Performance supplies the rail hardware: E05 40150 LH and E05 40151 RH new stock-replacement rails, the E05 40110 leak rail assembly, the E05 40120 Electronic Pressure Regulator DRV, an M18x1.5 rail plug, an M18x1.5 rail end to M14x1.5 adapter, an M14x1.5 three-way T fitting, an M14x1.5 plug and nut rail cap, and M12x1.5 to -6AN and -8AN high-flow CP3 supply fittings. XDP offers the XD603 driver side and XD604 passenger side new fuel rail assemblies, plus the XD516 fuel system contamination kit and the XD613 no-pump kit. Alliant Power rounds it out with the AP57002 fuel contamination kit and the AP57002NP no-pump version.

Fitment notes

The rails, leak rail and pressure regulator here are listed for 2011-2019, which matches the up-to-30,000-psi system on your truck. The 2020 and later 6.7L runs 36,000 psi with a different calibration and hardware set, so 2020-up rails are not a swap for a 2017-2019 Super Duty. Order by side: Exergy labels its rails LH and RH, and XDP labels them driver side and passenger side. The contamination kits are specific to 2017-2019. If you are adding a CP3-based pump with the supply fittings, confirm that kit's model-year fitment and CARB EO status for your state. Chassis cab F-350, F-450 and F-550 trucks differ from pickups in many parts, so verify by VIN.

Frequently asked questions

What do P0087 and P0088 codes mean on a 2017-2019 6.7L?

They are rail-pressure codes, and on this engine they are the classic warning that the CP4.2 high-pressure pump is in trouble. Check the fuel filters for metallic glitter, which confirms a pump failure. A hard start on its own is a different story: a warm hard-start most often traces to a fuel leak or poor fuel.

Do the rails have to be replaced after a CP4.2 failure?

Yes. Metal from a failed CP4.2 goes into the rails along with the injectors and lines, so the high-pressure lines are replaced along with the rails and injectors. Contamination kits from Alliant Power and XDP, with or without the pump, are built for that repair; check each kit's listing for exactly what is included.

Will rails from a 2020 or newer Super Duty fit my 2017-2019 truck?

No. The 2020 and later 6.7L runs 36,000 psi rails with a different calibration and hardware set. Stay with rails listed for 2011-2019, like the Exergy E05 40150 and E05 40151 or the XDP XD603 and XD604.

What is the DRV on the fuel rail?

DRV is the name used for the electronic pressure regulator valve on the rail. Exergy sells it as the E05 40120 Electronic Pressure Regulator DRV for 2011-2019 6.7L trucks, so you can replace it without buying a whole rail.

Not sure what fits? Call the shop at the number in the header, or use the fitment checker on any product page. We install everything we sell.