Product Description
CNC Fabrication 424003 98.5-03 7.3L Replacement High Pressure Oil Pump Lines
The CNC Fabrication 424003 Replacement High Pressure Oil Pump Line Kit is designed to replace the factory high-pressure oil lines on 1999-2003 Ford 7.3L Power Stroke engines. Built to eliminate the failure-prone OEM quick-connect STC fittings, this complete upgrade kit includes two premium high-pressure oil lines, genuine Brennan fittings, and Viton O-rings for a reliable, leak-free solution.
Manufactured in the USA using DuPont Teflon-lined hose technology, the CNC Fabrication 424003 kit is engineered to withstand the extreme pressures and temperatures found in the 7.3L HEUI injection system. With a burst pressure rating of 16,000 PSI and operating temperatures up to 400 degrees Fahrenheit, these upgraded HPOP lines offer superior durability and long-term reliability compared to aging factory components.
Features
- Direct replacement for factory 7.3L Power Stroke HPOP lines
- Eliminates OEM quick-connect STC fittings
- Advanced DuPont Teflon-lined hose construction
- 16,000 PSI burst pressure rating
- 5,000 PSI nominal working pressure at 72°F
- 3,000 PSI nominal working pressure at 400°F
- 400°F temperature rating
- Includes genuine Brennan fittings
- Premium Viton O-rings included
- Resists heat, thermal cycling, dry rot, and hose blistering
- Built specifically for HEUI injection system applications
- Manufactured in the USA
Fitment
- 1999 Ford F-Series Super Duty 7.3L Power Stroke
- 2000 Ford F-Series Super Duty 7.3L Power Stroke
- 2001 Ford F-Series Super Duty 7.3L Power Stroke
- 2002 Ford F-Series Super Duty 7.3L Power Stroke
- 2003 Ford F-Series Super Duty 7.3L Power Stroke
- Compatible with factory High Pressure Oil Pump systems
Note: This kit is intended for 1999-2003 Super Duty applications. The crossover line shown in some installation photos is not included. Always inspect routing clearance and verify that no wiring, hoses, or engine components contact the HPOP lines after installation.
What's Included
- (2) High Pressure Oil Pump Replacement Hoses
- Genuine Brennan Fittings
- Premium Viton O-Rings
- Installation Location Identification Markings
Specifications
- Manufacturer: CNC Fabrication
- Part Number: 424003
- Application: High Pressure Oil Pump Line Replacement Kit
- Engine Compatibility: 1999-2003 Ford 7.3L Power Stroke
- Line Quantity: 2
- Line Construction: DuPont Teflon-Lined Hose
- Fittings: Genuine Brennan Fittings
- O-Ring Material: Viton
- Burst Pressure Rating: 16,000 PSI
- Working Pressure: 5,000 PSI at 72°F
- Working Pressure at Elevated Temperature: 3,000 PSI at 400°F
- Maximum Temperature Rating: 400°F
- System Type: HEUI High Pressure Oil System
- Country of Origin: USA
Cross Reference Numbers
424003, CNC424003, 7.3 HPOP Line Kit, 7.3 High Pressure Oil Pump Hose Kit, 7.3 STC Fitting Elimination Kit, Power Stroke HPOP Hose Upgrade, 7.3 Oil Rail Hose Kit
FAQ
What does the CNC Fabrication 424003 replace?
This kit replaces the factory high-pressure oil pump lines and eliminates the OEM quick-connect STC fittings commonly found on aging 7.3L Power Stroke engines.
Does this kit include both HPOP lines?
Yes. The 424003 kit includes two replacement high-pressure oil lines along with the necessary fittings and Viton O-rings.
Are the factory spring checks reused?
No. The spring checks located beneath the factory pump fittings should be removed and not reinstalled when using this kit.
What pressure are these lines rated for?
The lines feature a 16,000 PSI burst pressure rating and are rated for 5,000 PSI working pressure at 72°F and 3,000 PSI working pressure at 400°F.
Do I need thread sealant during installation?
Thread sealant is generally not required. If desired, only Loctite 680 or Permatex 64000 retaining compound should be used on fittings installed into the HPOP.
What are the recommended torque specifications?
Pump fittings should be torqued to 28 ft-lbs, head fittings to 23 ft-lbs, and hose ends to 21 ft-lbs.
Why are these better than standard hydraulic hoses?
These lines are engineered specifically for engine-mounted HEUI oil systems and are designed to withstand the extreme heat, vibration, and thermal cycling that standard hydraulic hoses often cannot tolerate long-term.
