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Thumbnail Filmstrip of 1994-2003 7.3L Powerstroke HPOP Hose Kit Dieselsite HPOL73 Images
The DieselSite HPOL73 replaces both factory high pressure oil hoses on 1994-2003 Ford 7.3L Powerstroke engines. Each line runs from the high pressure oil pump to a cylinder head rail and uses stainless braided hose with an anti-abrasion coating.
The factory hoses rely on quick-connect ends that crack and leak oil into the valley, which drops ICP and causes hard starts. This kit swaps those connectors for threaded stainless ends and new fittings at both the pump and the rails, so one kit covers both OBS and Super Duty trucks.
- Stainless Braided Hose: Anti-abrasion coating protects the lines from chafing.
- Threaded Stainless Ends: Removes the quick-connects that commonly leak.
- Pump and Rail Fittings: New fittings with O-rings for both ends of each line.
- Routing Options: Two 90 degree adapters and spare rail plug O-rings included.
- OBS and Super Duty: One kit for every 1994-2003 7.3L.
Technical Specifications
- Part Number: HPOL73
- Manufacturer: DieselSite
- Hose: Stainless braided, anti-abrasion coated
- Included: 2 lines, 2 pump fittings, 2 rail fittings, 2 90 degree adapters, 2 spare O-rings
- Replaces: Both factory HPOP hoses
Vehicle Fitment & Technical Installation Notes
- Fitment: 1994-2003 Ford 7.3L Powerstroke F-Series and E-Series, OBS and Super Duty.
- Installation Tip: Remove and discard the check springs behind the factory pump fittings. Run the line with two 90 degree ends to the passenger rail from the rear pump outlet, and the 90 and straight line to the driver rail from the front outlet.
The DieselSite HPOL73 replaces both factory high pressure oil hoses on 1994-2003 Ford 7.3L Powerstroke engines. Each line runs from the high pressure oil pump to a cylinder head rail and uses stainless braided hose with an anti-abrasion coating.
The factory hoses rely on quick-connect ends that crack and leak oil into the valley, which drops ICP and causes hard starts. This kit swaps those connectors for threaded stainless ends and new fittings at both the pump and the rails, so one kit covers both OBS and Super Duty trucks.
Stainless Braided Hose: Anti-abrasion coating protects the lines from chafing.
Threaded Stainless Ends: Removes the quick-connects that commonly leak.
Pump and Rail Fittings: New fittings with O-rings for both ends of each line.
Routing Options: Two 90 degree adapters and spare rail plug O-rings included.
OBS and Super Duty: One kit for every 1994-2003 7.3L.
Technical Specifications
Part Number: HPOL73
Manufacturer: DieselSite
Hose: Stainless braided, anti-abrasion coated
Included: 2 lines, 2 pump fittings, 2 rail fittings, 2 90 degree adapters, 2 spare O-rings
Repla[...]
The DieselSite HPOL73 replaces both factory high pressure oil hoses on 1994-2003 Ford 7.3L Powerstroke engines. Each line runs from the high pressure oil pump to a cylinder head rail and uses stainless braided hose with an anti-abrasion coating.
The factory hoses rely on quick-connect ends that crack and leak oil into the valley, which drops ICP and causes hard starts. This kit swaps those connectors for threaded stainless ends and new fittings at both the pump and the rails, so one kit covers both OBS and Super Duty trucks.
- Stainless Braided Hose: Anti-abrasion coating protects the lines from chafing.
- Threaded Stainless Ends: Removes the quick-connects that commonly leak.
- Pump and Rail Fittings: New fittings with O-rings for both ends of each line.
- Routing Options: Two 90 degree adapters and spare rail plug O-rings included.
- OBS and Super Duty: One kit for every 1994-2003 7.3L.
Technical Specifications
- Part Number: HPOL73
- Manufacturer: DieselSite
- Hose: Stainless braided, anti-abrasion coated
- Included: 2 lines, 2 pump fittings, 2 rail fittings, 2 90 degree adapters, 2 spare O-rings
- Replaces: Both factory HPOP hoses
Vehicle Fitment & Technical Installation Notes
- Fitment: 1994-2003 Ford 7.3L Powerstroke F-Series and E-Series, OBS and Super Duty.
- Installation Tip: Remove and discard the check springs behind the factory pump fittings. Run the line with two 90 degree ends to the passenger rail from the rear pump outlet, and the 90 and straight line to the driver rail from the front outlet.
Q
Jason Pearce • 01/24/2026, 6:18:56 AM
Have you installed this new line set from diesel site? Do you have installation instructions? I did it today they are long, I’d like to know how it was intended to be installed.
A
01/28/2026, 2:07:33 PM
Please contact Dieselsite for specific installation questions. 888-414-3457
Q
rowland mason • 02/17/2026, 7:24:19 PM
I have a problem of the lines being to long. how do i go about this? How were they intended to be installed?
A
02/17/2026, 8:58:53 PM
There are alternate picture in the product that shows routing. If you have further questions please contact Dieselsite for clarity.
Q
Marcus McCord • 06/16/2026, 11:34:09 PM
What pressure rating are the hoses
A
06/17/2026, 1:01:51 PM
If you need an exact figure you probably will need to contact Dieselsite directly. They meet or exceed factory PSI ratings.
5/5 Stars out of 1 Reviews
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Deron Kauble (Clearwater) | June 13th, 2021
I cheaped out and bought some hoses off Amazon. Put the truck together after 7k in upgrades and found the Amazon hoses were crap. I again left the truck down because I did not want to drive it with the crap hoses on it. Ordered these from full force, arrived fast as usual and fit perfectly with no weird kinks and twists in them. 1000 miles on the truck do far and no issues. Lesson learned for sure!
Installation Tips:
- DISCARD THE CHECK SPRINGS FROM BEHIND YOUR FACTORY FITTINGS; DO NOT REINSTALL.
- Two (2) 90° adapters are supplied for your convenience in routing configuration.
- Two (2) spare o-rings are supplied for the oil rail plugs should you choose to relocate.
Proposition 65 Warning Information -
P65Warnings.ca.gov
Fits: 7.3 Powerstroke 1994-2003
Fits: 7.3 Powerstroke 1996-2003
Fits: 7.3 Powerstroke 1999-2003
Fits: 7.3 Powerstroke 1996-2003
Fits: 7.3 Powerstroke 1996-2003