Full Engine Fuel System Renewal — Complete 6-Injector Set with Nozzles for Navistar DT466

The Navistar DT466 is one of the most iconic inline-6 diesels in North America — powering International school buses, medium-duty trucks, and commercial fleet vehicles for decades. When injectors wear out, the performance drop is felt across all six cylinders: rough running, power loss, hard starts, and rising fuel consumption. This matched set of 6 OEM-equivalent fuel injectors (688840C91 / 749763C91 / 780328) includes integrated nozzles and covers every cylinder in a single service, restoring factory fuel delivery and getting your DT466 back to smooth, efficient operation.

✅ 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

🔧 Why This Set Delivers

• OEM-matched spray pattern — precision nozzles restore factory fuel atomization for clean combustion, reduced smoke, and better fuel economy
• 100% new aftermarket — not rebuilt or remanufactured; every injector starts with a full service life
• Matched set of 6 with nozzles included — uniform injection pressure across all cylinders; no need to source nozzles separately
• 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

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

🔑 Key Specs

• Part Numbers: 688840C91, 749763C91, 780328
• Condition: 100% New Aftermarket
• Quantity: Set of 6 (full engine coverage)
• Fitment: Navistar DT466 inline-6 diesel engine

💡 Only need one cylinder? Also available as a single injector with nozzle for targeted replacement.

Give your Navistar DT466 the complete injector refresh it deserves. In stock and ready to ship.