Product Description
CNC Fabrication 424004 98.5-03 7.3L High Pressure Oil Pump Lines with HPx Crossover
The CNC Fabrication 424004 High Pressure Oil Pump Line Kit with HPx Crossover is a complete upgrade solution for 1998.5-2003 Ford 7.3L Power Stroke engines. Designed to replace aging, leak-prone OEM HPOP lines and factory quick-connect STC fittings, this premium kit includes upgraded high-pressure oil lines, crossover hose, and all required fittings to improve reliability and eliminate common high-pressure oil system failures.
Manufactured in the USA using genuine Brennan fittings, DuPont Teflon-lined hose, and premium Viton O-rings, the CNC Fabrication 424004 kit is engineered to withstand the extreme pressures and temperatures found in the 7.3L HEUI injection system. The included HPx crossover line helps balance oil pressure between both cylinder heads, reducing pressure fluctuations and often decreasing engine idle noise caused by hydraulic resonance within the high-pressure oil system.
Features
- Complete replacement HPOP line kit for 1998.5-2003 7.3L Power Stroke engines
- Includes HPx crossover line for improved oil pressure balancing
- Eliminates factory STC quick-connect fittings
- All-new genuine Brennan fittings included
- DuPont Teflon-lined hose construction
- Premium Viton O-rings included
- 16,000 PSI burst pressure rating
- 5,000 PSI nominal working pressure
- 400-degree Fahrenheit temperature rating
- Designed specifically for HEUI high-pressure oil systems
- May reduce engine idle noise caused by pressure resonance
- Manufactured in the USA
Fitment
- 1998.5 Ford F-Series 7.3L Power Stroke Super Duty
- 1999 Ford F-Series 7.3L Power Stroke Super Duty
- 2000 Ford F-Series 7.3L Power Stroke Super Duty
- 2001 Ford F-Series 7.3L Power Stroke Super Duty
- 2002 Ford F-Series 7.3L Power Stroke Super Duty
- 2003 Ford F-Series 7.3L Power Stroke Super Duty
- Vehicles equipped with the factory HEUI high-pressure oil injection system
Note: This kit is designed to replace factory HPOP lines and eliminate OEM quick-connect fittings. Spring checks beneath the factory pump fittings must be removed and not reinstalled during installation.
What's Included
- (2) High Pressure Oil Pump Lines
- (1) HPx Crossover Hose
- Complete Genuine Brennan Fitting Kit
- Premium Viton O-Rings
- Installation Identification Markings
Specifications
- Manufacturer: CNC Fabrication
- Part Number: 424004
- Application: High Pressure Oil Pump Line Upgrade Kit
- Engine Compatibility: 1998.5-2003 Ford 7.3L Power Stroke
- System Type: HEUI High Pressure Oil System
- Line Construction: DuPont Teflon-Lined Hose
- Fittings: Genuine Brennan Hydraulic Fittings
- O-Ring Material: Viton
- Burst Pressure Rating: 16,000 PSI
- Nominal Working Pressure: 5,000 PSI
- Temperature Rating: 400 Degrees Fahrenheit
- Number of Hoses: 3
- Includes HPx Crossover: Yes
- Country of Origin: USA
Cross Reference Numbers
424004, CNC424004, HPx HPOP Line Kit, 7.3 HPOP Upgrade Kit, 7.3 High Pressure Oil Line Kit, 7.3 HPOP Crossover Kit, 7.3 STC Elimination Kit, Power Stroke HPOP Hose Upgrade
FAQ
What does the HPx crossover line do?
The HPx crossover connects both cylinder heads to help balance high-pressure oil between each bank. While it does not increase horsepower, many owners report reduced engine idle noise and smoother operation.
Does this kit eliminate the factory quick-connect fittings?
Yes. The CNC Fabrication 424004 kit includes all required fittings to eliminate the factory STC quick-connect fittings at both the HPOP and cylinder heads.
What pressure is this system rated for?
The hoses feature a 16,000 PSI burst pressure rating with a 5,000 PSI nominal working pressure rating.
Are fittings and seals included?
Yes. The kit includes genuine Brennan fittings and premium Viton O-rings for a complete installation.
Do I need thread sealant?
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.
Are there any special installation requirements?
Yes. Disconnect battery grounds before installation, remove the factory spring checks beneath the pump fittings, verify proper hose routing, and ensure no wires or components can rub against the hoses after installation.
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.
