Single Cylinder Fix — OEM-Spec Fuel Injector with Nozzle for Navistar DT466 Engines

The DT466 is one of the most trusted inline-6 diesels in North America — powering International school buses, medium-duty trucks, and commercial fleet vehicles. When one injector fails, rough running, power loss, and black smoke are immediately noticeable. This direct-fit replacement (688840C91 / 749763C91 / 780328) includes the integrated nozzle and restores factory spray pattern and injection pressure to the affected cylinder, getting your DT466 running cleanly again.

✅ Direct-Fit Compatibility

• Engine: Navistar DT466 (Inline-6 Diesel)
• Applications: International school buses, medium-duty trucks, commercial & municipal fleet vehicles, industrial equipment
• Bolt-on replacement — no modifications required

🔧 Built to OEM Standards

• OEM-matched spray pattern — precision nozzle restores factory fuel atomization for clean combustion, reduced smoke, and better fuel economy
• 100% new aftermarket — not rebuilt or remanufactured; starts with a full service life
• Nozzle included — no need to source separately; complete drop-in replacement
• Triple OEM cross-reference — replaces 688840C91, 749763C91, and 780328 for maximum fitment confidence
• Reliable cold starts — consistent fuel delivery for dependable starting in all conditions

📦 What's Included

• 1 × Fuel Injector with Nozzle (688840C91 / 749763C91 / 780328)

🔑 Key Specs

• Part Numbers: 688840C91, 749763C91, 780328
• Condition: 100% New Aftermarket
• Quantity: 1 piece (single cylinder replacement)
• Fitment: Navistar DT466 inline-6 diesel engine

💡 Replacing all six cylinders? Save with our 6-piece complete set with nozzles for uniform performance and better value.

In stock and ready to ship. Order today and keep your DT466 running at full power.