(99-03) 7.3 High Pressure Oil Lines - 5800psi Hoses - 7.3L 7.3

CR Performance High Pressure Oil Lines are designed as a direct replacement set for 1999-2003 7.3L diesel engines. This package addresses worn factory plumbing by providing the left line, right line, and oil crossover hose along with matching fittings. It directly replaces factory part numbers YC3Z-9J323-E, YC3Z-9J323-F, and F81Z-9J323-E, including single 90-degree passenger-side hose setups.

The build centers around double-braided, anti-abrasion Diamond series hose material rated for a 5800 PSI working pressure and 23,200 burst PSI. It operates across a temperature range of -50F to 260F. For additional thermal protection, the crossover line comes with a seamless fiberglass sleeve heat shield capable of withstanding temperatures up to 1100F.

To minimize fluid restriction and prevent leaks, the assembly utilizes angled fittings instead of separate 90-degree adapters. The one-piece, zinc-plated bite-to-wire fittings are crimped to prevent slipping off the hose ends, and each assembly is measured twice with a micrometer during production. The kit is made in the USA and backed by a limited lifetime warranty on hose assemblies.

When considering this kit, note that fitment is limited strictly to 1999 through 2003 model years with stock configurations. The manufacturer notes that these lines may not be compatible with aftermarket or non-OEM engine components.

Verdict: This hose kit is a solid choice for owners of 1999-2003 7.3L diesel trucks seeking a heavy-duty, direct replacement for stock high-pressure oil lines. It provides high pressure tolerances, heat shielding, and secure fittings for stock engine bays.

• Engine Compatibility: 1999-2003 7.3L Diesel
• Working Pressure: 5800 PSI (23,200 BPSI)
• Hose Temperature Range: -50F to 260F
• Heat Shield Rating: Up to 1100F
• Hose Construction: Double braided anti-abrasion hose
• Fitting Material: Zinc-plated bite-to-wire fittings
• Country of Origin: Made in USA
• Warranty: Limited Lifetime Warranty for hose assemblies

A great fit if you:

• Own a 1999-2003 7.3L diesel truck with stock engine parts.
• Need to replace part numbers YC3Z-9J323-E, YC3Z-9J323-F, or F81Z-9J323-E.
• Want high-pressure double-braided lines with integrated heat shielding for the crossover.

Consider something else if you:

• Drive a vehicle outside the 1999-2003 model year range.
• Have modified your high-pressure oil system with non-OEM aftermarket components.

What vehicles are compatible with these oil lines?
They fit 1999 to 2003 7.3L diesel engines using OEM components.

What is included in the package?
The kit includes the left and right lines, a crossover hose with a heat shield, fittings, and illustrated instructions.

What factory part numbers do these lines replace?
They replace OEM numbers YC3Z-9J323-E, YC3Z-9J323-F, and F81Z-9J323-E, including single 90 passenger-side hose setups.

What is the pressure rating of the hoses?
The hoses have a working pressure rating of 5800 PSI and a burst rating of 23,200 BPSI.